net.openhft.chronicle.map.ChronicleMapBuilder Maven / Gradle / Ivy
/*
* Copyright (C) 2015 higherfrequencytrading.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see {@code
* ChronicleMap map = ChronicleMapOnHeapUpdatableBuilder
* .of(Key.class, Value.class)
* .entries(100500)
* // ... other configurations
* .create();}
* it could be prepared and used to create many similar maps: {@code
* ChronicleMapBuilder builder = ChronicleMapBuilder
* .of(Key.class, Value.class)
* .entries(100500);
*
* ChronicleMap map1 = builder.create();
* ChronicleMap map2 = builder.create();}
* i. e. created {@code ChronicleMap} instances don't depend on the builder.
*
* {@code ChronicleMapBuilder} is mutable, see a note in {@link ChronicleHashBuilder} interface
* documentation.
*
*
Later in this documentation, "ChronicleMap" means "ChronicleMaps, created by {@code
* ChronicleMapBuilder}", unless specified different, because theoretically someone might provide
* {@code ChronicleMap} implementations with completely different properties.
*
*
{@code ChronicleMap} ("ChronicleMaps, created by {@code ChronicleMapBuilder}") currently
* doesn't support resizing. That is why you must configure {@linkplain #entries(long) number
* of entries} you are going to insert into the created map at most. See {@link
* #entries(long)} method documentation for more information on this.
*
*
If you key or value type is not constantly sized and known to {@code ChronicleHashBuilder}, i.
* e. it is not a boxed primitive, data value generated interface, {@link Byteable}, etc. (see the
* complete list TODO insert the link to the complete list), you must provide the {@code
* ChronicleHashBuilder} with some information about you keys or values: if they are
* constantly-sized, call {@link #constantKeySizeBySample(Object)}, otherwise {@link
* ChronicleHashBuilder#averageKeySize(double)} method, accordingly for values.
*
* @param key type of the maps, produced by this builder
* @param value type of the maps, produced by this builder
* @see ChronicleMap
* @see ChronicleSetBuilder
*/
public class ChronicleMapBuilder implements Cloneable,
ChronicleHashBuilder, ChronicleMapBuilder>,
MapBuilder>, Serializable {
static final byte UDP_REPLICATION_MODIFICATION_ITERATOR_ID = (byte) 127;
private static final int DEFAULT_KEY_OR_VALUE_SIZE = 120;
private static final long DEFAULT_ENTRIES = 1 << 20;
private static final int MAX_SEGMENTS = (1 << 30);
private static final int MAX_SEGMENTS_TO_CHAISE_COMPACT_MULTI_MAPS = (1 << 20);
private static final Logger LOG =
LoggerFactory.getLogger(ChronicleMapBuilder.class.getName());
private static final StringBuilder EMTRY_STRING_BUILDER = new StringBuilder();
private static final double UNDEFINED_DOUBLE_CONFIG = Double.NaN;
private static final int XML_SERIALIZATION = 1;
private static final int BINARY_SERIALIZATION = 2;
private static boolean isDefined(double config) {
return !Double.isNaN(config);
}
private static final boolean strictStateChecks =
Boolean.getBoolean("chronicle.strictStateChecks");
SerializationBuilder keyBuilder;
SerializationBuilder valueBuilder;
private String name;
// used when configuring the number of segments.
private int minSegments = -1;
private int actualSegments = -1;
// used when reading the number of entries per
private long entriesPerSegment = -1L;
private long actualChunksPerSegment = -1L;
private double averageKeySize = UNDEFINED_DOUBLE_CONFIG;
private K sampleKey;
private double averageValueSize = UNDEFINED_DOUBLE_CONFIG;
private V sampleValue;
private int actualChunkSize = 0;
private int maxChunksPerEntry = -1;
private Alignment alignment = null;
private long entries = -1;
private long lockTimeOut = 20000;
private TimeUnit lockTimeOutUnit = TimeUnit.MILLISECONDS;
private int metaDataBytes = 0;
private ChronicleHashErrorListener errorListener = ChronicleHashErrorListeners.logging();
private boolean putReturnsNull = false;
private boolean removeReturnsNull = false;
// replication
private TimeProvider timeProvider = TimeProvider.SYSTEM;
private BytesMarshallerFactory bytesMarshallerFactory;
private ObjectSerializer objectSerializer;
private MapEventListener eventListener = null;
private BytesMapEventListener bytesEventListener = null;
private V defaultValue = null;
private DefaultValueProvider defaultValueProvider = null;
private PrepareValueBytes prepareValueBytes = null;
private SingleChronicleHashReplication singleHashReplication = null;
private InetSocketAddress[] pushToAddresses;
ChronicleMapBuilder(Class keyClass, Class valueClass) {
keyBuilder = new SerializationBuilder<>(keyClass, SerializationBuilder.Role.KEY);
valueBuilder = new SerializationBuilder<>(valueClass, SerializationBuilder.Role.VALUE);
if (CharSequence.class == valueClass)
defaultValue = (V) "";
if (StringBuilder.class == valueClass)
defaultValue = (V) EMTRY_STRING_BUILDER;
}
/**
* Returns a new {@code ChronicleMapBuilder} instance which is able to {@linkplain #create()
* create} maps with the specified key and value classes.
*
* @param keyClass class object used to infer key type and discover it's properties via
* reflection
* @param valueClass class object used to infer value type and discover it's properties via
* reflection
* @param key type of the maps, created by the returned builder
* @param value type of the maps, created by the returned builder
* @return a new builder for the given key and value classes
*/
public static ChronicleMapBuilder of(
@NotNull Class keyClass, @NotNull Class valueClass) {
return new ChronicleMapBuilder<>(keyClass, valueClass);
}
public static ChronicleMapStatelessClientBuilder of(
@NotNull Class keyClass, @NotNull Class valueClass, InetSocketAddress socketAddress) {
return ChronicleMapStatelessClientBuilder.of(socketAddress);
}
private static long roundUpMapHeaderSize(long headerSize) {
long roundUp = (headerSize + 127L) & ~127L;
if (roundUp - headerSize < 64)
roundUp += 128;
return roundUp;
}
private static void checkSegments(int segments) {
if (segments <= 0 || segments > MAX_SEGMENTS)
throw new IllegalArgumentException("segments should be positive, " +
segments + " given");
if (segments > MAX_SEGMENTS)
throw new IllegalArgumentException("Max segments is " + MAX_SEGMENTS + ", " +
segments + " given");
}
private static long divideUpper(long dividend, long divisor) {
return ((dividend - 1L) / divisor) + 1L;
}
private static String pretty(int value) {
return value > 0 ? value + "" : "not configured";
}
private static String pretty(Object obj) {
return obj != null ? obj + "" : "not configured";
}
public ChronicleMapBuilder pushTo(InetSocketAddress... addresses) {
this.pushToAddresses = addresses;
return this;
}
@Override
public ChronicleMapBuilder clone() {
try {
@SuppressWarnings("unchecked")
ChronicleMapBuilder result =
(ChronicleMapBuilder) super.clone();
result.keyBuilder = keyBuilder.clone();
result.valueBuilder = valueBuilder.clone();
return result;
} catch (CloneNotSupportedException e) {
throw new AssertionError(e);
}
}
/**
* {@inheritDoc}
*
* Example: if keys in your map(s) are English words in {@link String} form, average English
* word length is 5.1, configure average key size of 6:
{@code
* ChronicleMap wordFrequencies = ChronicleMapBuilder
* .of(String.class, LongValue.class)
* .entries(50000)
* .averageKeySize(6)
* .create();}
* (Note that 6 is chosen as average key size in bytes despite strings in Java are UTF-16
* encoded (and each character takes 2 bytes on-heap), because default off-heap {@link String}
* encoding is UTF-8 in {@code ChronicleMap}.)
*
* @param averageKeySize
* @throws IllegalStateException {@inheritDoc}
* @throws IllegalArgumentException {@inheritDoc}
* @see #constantKeySizeBySample(Object)
* @see #averageValueSize(double)
* @see #actualChunkSize(int)
*/
@Override
public ChronicleMapBuilder averageKeySize(double averageKeySize) {
checkSizeIsNotStaticallyKnown(keyBuilder);
checkAverageSize(averageKeySize, "key");
this.averageKeySize = averageKeySize;
return this;
}
/**
* {@inheritDoc}
*
* For example, if your keys are Git commit hashes:
{@code
* Map gitCommitMessagesByHash =
* ChronicleMapBuilder.of(byte[].class, String.class)
* .constantKeySizeBySample(new byte[20])
* .immutableKeys()
* .create();}
*
* @see ChronicleHashBuilder#averageKeySize(double)
* @see #constantValueSizeBySample(Object)
*/
@Override
public ChronicleMapBuilder constantKeySizeBySample(K sampleKey) {
this.sampleKey = sampleKey;
return this;
}
private double averageKeySize() {
return averageKeyOrValueSize(averageKeySize, keyBuilder);
}
/**
* Configures the average number of bytes, taken by serialized form of values, put into maps,
* created by this builder. If value size is always the same, call {@link
* #constantValueSizeBySample(Object)} method instead of this one.
*
* {@code ChronicleHashBuilder} implementation heuristically chooses {@linkplain
* #actualChunkSize(int) the actual chunk size} based on this configuration and the key size,
* that, however, might result to quite high internal fragmentation, i. e. losses because only
* integral number of chunks could be allocated for the entry. If you want to avoid this, you
* should manually configure the actual chunk size in addition to this average value size
* configuration, which is anyway needed.
*
*
If values are of boxed primitive type or {@link Byteable} subclass, i. e. if value size is
* known statically, it is automatically accounted and shouldn't be specified by user.
*
* @param averageValueSize number of bytes, taken by serialized form of values
* @return this builder back
* @throws IllegalStateException if value size is known statically and shouldn't be
* configured by user
* @throws IllegalArgumentException if the given {@code averageValueSize} is non-positive
* @see #constantValueSizeBySample(Object)
* @see ChronicleHashBuilder#averageKeySize(double)
* @see #actualChunkSize(int)
*/
public ChronicleMapBuilder averageValueSize(double averageValueSize) {
checkSizeIsNotStaticallyKnown(valueBuilder);
checkAverageSize(averageValueSize, "value");
this.averageValueSize = averageValueSize;
return this;
}
private static void checkAverageSize(double averageSize, String role) {
if (averageSize <= 0 || Double.isNaN(averageSize) ||
Double.isInfinite(averageSize)) {
throw new IllegalArgumentException("Average " + role + " size must be a positive, " +
"finite number");
}
}
private static void checkSizeIsNotStaticallyKnown(SerializationBuilder builder) {
if (builder.sizeIsStaticallyKnown)
throw new IllegalStateException("Size of type " + builder.eClass +
" is statically known and shouldn't be specified manually");
}
/**
* Configures the constant number of bytes, taken by serialized form of values, put into maps,
* created by this builder. This is done by providing the {@code sampleValue}, all values should
* take the same number of bytes in serialized form, as this sample object.
*
* If values are of boxed primitive type or {@link Byteable} subclass, i. e. if value size is
* known statically, it is automatically accounted and this method shouldn't be called.
*
*
If value size varies, method {@link #averageValueSize(double)} should be called instead of
* this one.
*
* @param sampleValue the sample value
* @return this builder back
* @see #averageValueSize(double)
* @see #constantKeySizeBySample(Object)
*/
public ChronicleMapBuilder constantValueSizeBySample(V sampleValue) {
this.sampleValue = sampleValue;
return this;
}
double averageValueSize() {
return averageKeyOrValueSize(averageValueSize, valueBuilder);
}
private double averageKeyOrValueSize(double configuredSize, SerializationBuilder builder) {
if (isDefined(configuredSize))
return configuredSize;
if (builder.constantSizeMarshaller())
return builder.pseudoReadConstantSize();
return DEFAULT_KEY_OR_VALUE_SIZE;
}
/**
* {@inheritDoc}
*
* @throws IllegalStateException is sizes of both keys and values of maps created by this
* builder are constant, hence chunk size shouldn't be configured
* by user
* @see #entryAndValueAlignment(Alignment)
* @see #entries(long)
* @see #maxChunksPerEntry(int)
*/
@Override
public ChronicleMapBuilder actualChunkSize(int actualChunkSize) {
if (constantlySizedEntries()) {
throw new IllegalStateException("Sizes of key type: " + keyBuilder.eClass + " and " +
"value type: " + valueBuilder.eClass + " are both constant, " +
"so chunk size shouldn't be specified manually");
}
if (actualChunkSize <= 0)
throw new IllegalArgumentException("Chunk size must be positive");
this.actualChunkSize = actualChunkSize;
return this;
}
static class EntrySizeInfo {
final double averageEntrySize;
final int worstAlignment;
public EntrySizeInfo(double averageEntrySize, int worstAlignment) {
this.averageEntrySize = averageEntrySize;
this.worstAlignment = worstAlignment;
}
}
private EntrySizeInfo entrySizeInfo(boolean replicated) {
double size = metaDataBytes;
double keySize = averageKeySize();
size += averageSizeEncodingSize(keyBuilder, keySize);
size += keySize;
if (replicated)
size += ReplicatedChronicleMap.ADDITIONAL_ENTRY_BYTES;
double valueSize = averageValueSize();
size += averageSizeEncodingSize(valueBuilder, valueSize);
Alignment alignment = valueAlignment();
int worstAlignment;
if (alignment != Alignment.NO_ALIGNMENT &&
constantlySizedKeys() && valueBuilder.constantSizeEncodingSizeMarshaller()) {
long constantSizeBeforeAlignment = round(size);
if (constantlySizedValues()) {
// see specialEntrySpaceOffset()
long totalDataSize = constantSizeBeforeAlignment + constantValueSize();
worstAlignment = (int) (alignment.alignAddr(totalDataSize) - totalDataSize);
} else {
determineAlignment:
if (actualChunkSize > 0) {
worstAlignment = worstAlignmentAssumingChunkSize(constantSizeBeforeAlignment,
actualChunkSize);
} else {
int chunkSize = 8;
worstAlignment = worstAlignmentAssumingChunkSize(
constantSizeBeforeAlignment, chunkSize);
if (size + worstAlignment + valueSize >=
maxDefaultChunksPerAverageEntry(replicated) * chunkSize) {
break determineAlignment;
}
chunkSize = 4;
worstAlignment = worstAlignmentAssumingChunkSize(
constantSizeBeforeAlignment, chunkSize);
}
}
} else {
// assume worst case, we always lose most possible bytes for alignment
worstAlignment = alignment.alignment() - 1;
}
size += worstAlignment;
size += valueSize;
return new EntrySizeInfo(size, worstAlignment);
}
/**
* This is needed, if chunkSize = constant entry size is not aligned, for entry alignment to be
* always the same, we should _misalign_ the first chunk.
*/
int specialEntrySpaceOffset(boolean replicated) {
if (!constantlySizedEntries())
return 0;
return (int) (constantValueSize() % valueAlignment().alignment());
}
private long constantValueSize() {
return valueBuilder.pseudoReadConstantSize();
}
private boolean constantlySizedKeys() {
return keyBuilder.constantSizeMarshaller();
}
private static double averageSizeEncodingSize(
SerializationBuilder builder, double averageSize) {
SizeMarshaller sizeMarshaller = builder.sizeMarshaller();
if (averageSize == round(averageSize))
return sizeMarshaller.sizeEncodingSize(round(averageSize));
long lower = (long) averageSize;
long upper = lower + 1;
int lowerEncodingSize = sizeMarshaller.sizeEncodingSize(lower);
int upperEncodingSize = sizeMarshaller.sizeEncodingSize(upper);
if (lowerEncodingSize == upperEncodingSize)
return lowerEncodingSize;
return lower * (upper - averageSize) + upper * (averageSize - lower);
}
private int worstAlignmentAssumingChunkSize(
long constantSizeBeforeAlignment, int chunkSize) {
Alignment valueAlignment = valueAlignment();
long firstAlignment = valueAlignment.alignAddr(constantSizeBeforeAlignment) -
constantSizeBeforeAlignment;
int alignment = valueAlignment.alignment();
int gcdOfAlignmentAndChunkSize = greatestCommonDivisor(alignment, chunkSize);
if (gcdOfAlignmentAndChunkSize == alignment)
return (int) firstAlignment;
// assume worst by now because we cannot predict alignment in VanillaCM.entrySize() method
// before allocation
long worstAlignment = firstAlignment;
while (worstAlignment + gcdOfAlignmentAndChunkSize < alignment)
worstAlignment += gcdOfAlignmentAndChunkSize;
return (int) worstAlignment;
}
int worstAlignment(boolean replicated) {
return entrySizeInfo(replicated).worstAlignment;
}
static int greatestCommonDivisor(int a, int b) {
if (b == 0) return a;
return greatestCommonDivisor(b, a % b);
}
long chunkSize(boolean replicated) {
if (actualChunkSize > 0)
return actualChunkSize;
double averageEntrySize = entrySizeInfo(replicated).averageEntrySize;
if (constantlySizedEntries())
return round(averageEntrySize);
int maxChunkSize = 1 << 30;
for (long chunkSize = 4; chunkSize <= maxChunkSize; chunkSize *= 2L) {
if (maxDefaultChunksPerAverageEntry(replicated) * chunkSize > averageEntrySize)
return chunkSize;
}
return maxChunkSize;
}
boolean constantlySizedEntries() {
return constantlySizedKeys() && constantlySizedValues();
}
double averageChunksPerEntry(boolean replicated) {
if (constantlySizedEntries())
return 1.0;
long chunkSize = chunkSize(replicated);
// assuming we always has worst internal fragmentation. This affects total segment
// entry space which is allocated lazily on Linux (main target platform)
// so we can afford this
return (entrySizeInfo(replicated).averageEntrySize + chunkSize - 1) / chunkSize;
}
private static int maxDefaultChunksPerAverageEntry(boolean replicated) {
return replicated ? 4 : 8;
}
@Override
public ChronicleMapBuilder maxChunksPerEntry(int maxChunksPerEntry) {
if (maxChunksPerEntry < 1)
throw new IllegalArgumentException("maxChunksPerEntry should be >= 1, " +
maxChunksPerEntry + " given");
this.maxChunksPerEntry = maxChunksPerEntry;
return this;
}
int maxChunksPerEntry() {
if (maxChunksPerEntry > 0)
return maxChunksPerEntry;
if (constantlySizedEntries()) {
return 1;
} else {
return Integer.MAX_VALUE;
}
}
private boolean constantlySizedValues() {
return valueBuilder.constantSizeMarshaller();
}
/**
* Configures alignment strategy of address in memory of entries and independently of address in
* memory of values within entries in ChronicleMaps, created by this builder.
*
* Useful when values of the map are updated intensively, particularly fields with volatile
* access, because it doesn't work well if the value crosses cache lines. Also, on some
* (nowadays rare) architectures any misaligned memory access is more expensive than aligned.
*
*
If values couldn't reference off-heap memory (i. e. it is not {@link Byteable} or "data
* value generated"), alignment configuration makes no sense and forbidden.
*
*
Default is {@link Alignment#NO_ALIGNMENT} if values couldn't reference off-heap memory,
* otherwise chosen heuristically (configure explicitly for being sure and to compare
* performance in your case).
*
* @param alignment the new alignment of the maps constructed by this builder
* @return this {@code ChronicleMapOnHeapUpdatableBuilder} back
* @throws IllegalStateException if values of maps, created by this builder, couldn't reference
* off-heap memory
*/
public ChronicleMapBuilder entryAndValueAlignment(Alignment alignment) {
this.alignment = alignment;
checkAlignmentOnlyIfValuesPossiblyReferenceOffHeap();
return this;
}
private void checkAlignmentOnlyIfValuesPossiblyReferenceOffHeap() {
if (!valueBuilder.possibleOffHeapReferences() &&
(alignment == Alignment.OF_4_BYTES || alignment == Alignment.OF_8_BYTES))
throw new IllegalStateException("Entry and value alignment should be configured only " +
"if values might point to off-heap memory");
}
Alignment valueAlignment() {
if (alignment != null)
return alignment;
Class firstPrimitiveFieldType = firstPrimitiveFieldType(valueBuilder.eClass);
if (firstPrimitiveFieldType == long.class || firstPrimitiveFieldType == double.class)
return Alignment.OF_8_BYTES;
if (firstPrimitiveFieldType == int.class || firstPrimitiveFieldType == float.class)
return Alignment.OF_4_BYTES;
return Alignment.NO_ALIGNMENT;
}
@Override
public ChronicleMapBuilder entries(long entries) {
if (entries <= 0L)
throw new IllegalArgumentException("Entries should be positive, " + entries + " given");
this.entries = entries;
return this;
}
long entries() {
if (entries < 0)
return DEFAULT_ENTRIES;
return entries;
}
@Override
public ChronicleMapBuilder entriesPerSegment(long entriesPerSegment) {
if (entriesPerSegment <= 0L)
throw new IllegalArgumentException("Entries per segment should be positive, " +
entriesPerSegment + " given");
this.entriesPerSegment = entriesPerSegment;
return this;
}
long entriesPerSegment(boolean replicated) {
long entriesPerSegment;
if (this.entriesPerSegment > 0L) {
entriesPerSegment = this.entriesPerSegment;
} else {
int actualSegments = actualSegments(replicated);
long totalEntries = totalEntriesIfPoorDistribution(actualSegments);
entriesPerSegment = divideUpper(totalEntries, actualSegments);
}
if (actualChunksPerSegment > 0)
return entriesPerSegment;
double averageChunksPerEntry = averageChunksPerEntry(replicated);
if (entriesPerSegment * averageChunksPerEntry > MultiMapFactory.MAX_CAPACITY)
throw new IllegalStateException("Max chunks per segment is " +
MultiMapFactory.MAX_CAPACITY + " configured entries() and " +
"actualSegments() so that there should be " + entriesPerSegment +
" entries per segment, while average chunks per entry is " +
averageChunksPerEntry);
return entriesPerSegment;
}
@Override
public ChronicleMapBuilder actualChunksPerSegment(long actualChunksPerSegment) {
if (actualChunksPerSegment <= 0)
throw new IllegalArgumentException("Actual chunks per segment should be positive, " +
actualChunksPerSegment + " given");
this.actualChunksPerSegment = actualChunksPerSegment;
return this;
}
private void checkActualChunksPerSegmentIsConfiguredOnlyIfOtherLowLevelConfigsAreManual() {
if (actualChunksPerSegment > 0) {
if (entriesPerSegment <= 0 || (actualChunkSize <= 0 && !constantlySizedEntries()) ||
actualSegments <= 0)
throw new IllegalStateException("Actual chunks per entry could be configured " +
"only if other three low level configs are manual: " +
"entriesPerSegment(), actualSegments() and actualChunkSize(), unless " +
"both keys and value sizes are constant");
}
}
private void checkActualChunksPerSegmentGreaterOrEqualToEntries() {
if (actualChunksPerSegment > 0 && entriesPerSegment > 0 &&
entriesPerSegment > actualChunksPerSegment) {
throw new IllegalStateException("Entries per segment couldn't be greater than " +
"actual chunks per segment. Entries: " + entriesPerSegment + ", " +
"chunks: " + actualChunksPerSegment + " is configured");
}
}
long actualChunksPerSegment(boolean replicated) {
if (actualChunksPerSegment > 0)
return actualChunksPerSegment;
return round(entriesPerSegment(replicated) * averageChunksPerEntry(replicated));
}
private long totalEntriesIfPoorDistribution(int segments) {
if (segments == 1)
return entries();
long entries = entries();
// check if the number of entries is small compared with the number of segments.
long s3 = (long) Math.min(8, segments) * Math.min(32, segments) * Math.min(128, segments);
if (entries * 4 <= s3)
entries *= 1.8;
else if (entries <= s3)
entries *= 1.45;
else if (entries <= s3 * 4)
entries *= 1.33;
else if (entries <= s3 * 8)
entries *= 1.22;
else if (entries <= s3 * 16)
entries *= 1.15;
else
entries *= 1.1;
return Math.min(segments * entries(),
entries + 4 * segments + 8);
}
@Override
public ChronicleMapBuilder minSegments(int minSegments) {
checkSegments(minSegments);
this.minSegments = minSegments;
return this;
}
int minSegments() {
return Math.max(estimateSegments(), minSegments);
}
private int estimateSegments() {
return (int) Math.min(Maths.nextPower2(entries() / 32, 1), estimateSegmentsBasedOnSize());
}
//TODO reivew because this heuristic doesn't seem to perform well
private int estimateSegmentsBasedOnSize() {
// the idea is that if values are huge, operations on them (and simply ser/deser)
// could take long time, so we want more segment to minimize probablity that
// two or more concurrent write ops will go to the same segment, and then all but one of
// these threads will wait for long time.
int segmentsForEntries = estimateSegmentsForEntries(entries());
double averageValueSize = averageValueSize();
return averageValueSize >= 1000000
? segmentsForEntries * 16
: averageValueSize >= 100000
? segmentsForEntries * 8
: averageValueSize >= 10000
? segmentsForEntries * 4
: averageValueSize >= 1000
? segmentsForEntries * 2
: segmentsForEntries;
}
private static int estimateSegmentsForEntries(long size) {
if (size > 200 << 20)
return 256;
if (size >= 1 << 20)
return 128;
if (size >= 128 << 10)
return 64;
if (size >= 16 << 10)
return 32;
if (size >= 4 << 10)
return 16;
if (size >= 1 << 10)
return 8;
return 1;
}
@Override
public ChronicleMapBuilder actualSegments(int actualSegments) {
checkSegments(actualSegments);
this.actualSegments = actualSegments;
return this;
}
int actualSegments(boolean replicated) {
if (actualSegments > 0)
return actualSegments;
if (entriesPerSegment > 0) {
long segments = 1;
for (int i = 0; i < 3; i++) { // try to converge
long totalEntries = totalEntriesIfPoorDistribution((int) segments);
segments = divideUpper(totalEntries, entriesPerSegment);
if (segments > MAX_SEGMENTS)
throw new IllegalStateException();
}
if (minSegments > 0)
segments = Math.max(minSegments, segments);
return (int) segments;
}
long shortMMapSegments = trySegments(MultiMapFactory.I16_MAX_CAPACITY,
MAX_SEGMENTS_TO_CHAISE_COMPACT_MULTI_MAPS, replicated);
// TODO why not try I24 multiMap?
if (shortMMapSegments > 0L)
return (int) shortMMapSegments;
long intMMapSegments = trySegments(MultiMapFactory.MAX_CAPACITY, MAX_SEGMENTS, replicated);
if (intMMapSegments > 0L)
return (int) intMMapSegments;
throw new IllegalStateException("Max segments is " + MAX_SEGMENTS + ", configured so much" +
" entries (" + entries() + ") or average chunks per entry is too high (" +
averageChunksPerEntry(replicated) + ") that builder automatically decided to use " +
(-intMMapSegments) + " segments");
}
private long trySegments(long maxSegmentCapacity, int maxSegments, boolean replicated) {
long totalChunks = round(totalEntriesIfPoorDistribution(minSegments()) *
averageChunksPerEntry(replicated));
long segments = divideUpper(totalChunks, maxSegmentCapacity);
segments = Maths.nextPower2(Math.max(segments, minSegments()), 1L);
return segments <= maxSegments ? segments : -segments;
}
int segmentHeaderSize(boolean replicated) {
int segments = actualSegments(replicated);
// reduce false sharing unless we have a lot of segments.
return segments <= 16 * 1024 ? 64 : 32;
}
MultiMapFactory multiMapFactory(boolean replicated) {
return MultiMapFactory.forCapacity(actualChunksPerSegment(replicated));
}
public ChronicleMapBuilder lockTimeOut(long lockTimeOut, TimeUnit unit) {
this.lockTimeOut = lockTimeOut;
lockTimeOutUnit = unit;
return this;
}
long lockTimeOut(TimeUnit unit) {
return unit.convert(lockTimeOut, lockTimeOutUnit);
}
@Override
public ChronicleMapBuilder errorListener(ChronicleHashErrorListener errorListener) {
this.errorListener = errorListener;
return this;
}
ChronicleHashErrorListener errorListener() {
return errorListener;
}
@Override
public ChronicleMapBuilder putReturnsNull(boolean putReturnsNull) {
this.putReturnsNull = putReturnsNull;
return this;
}
boolean putReturnsNull() {
return putReturnsNull;
}
@Override
public ChronicleMapBuilder removeReturnsNull(boolean removeReturnsNull) {
this.removeReturnsNull = removeReturnsNull;
return this;
}
boolean removeReturnsNull() {
return removeReturnsNull;
}
@Override
public ChronicleMapBuilder metaDataBytes(int metaDataBytes) {
if (metaDataBytes < 0 || metaDataBytes > 255)
throw new IllegalArgumentException("MetaDataBytes must be [0..255] was " + metaDataBytes);
this.metaDataBytes = metaDataBytes;
return this;
}
int metaDataBytes() {
return metaDataBytes;
}
@Override
public String toString() {
return "ChronicleMapBuilder{" +
"name=" + name +
", actualSegments=" + pretty(actualSegments) +
", minSegments=" + pretty(minSegments) +
", entriesPerSegment=" + pretty(entriesPerSegment) +
", actualChunksPerSegment=" + pretty(actualChunksPerSegment) +
", averageKeySize=" + pretty(averageKeySize) +
", sampleKeyForConstantSizeComputation=" + pretty(sampleKey) +
", averageValueSize=" + pretty(averageValueSize) +
", sampleValueForConstantSizeComputation=" + pretty(sampleValue) +
", actualChunkSize=" + pretty(actualChunkSize) +
", valueAlignment=" + valueAlignment() +
", entries=" + entries() +
", lockTimeOut=" + lockTimeOut + " " + lockTimeOutUnit +
", metaDataBytes=" + metaDataBytes() +
", errorListener=" + errorListener() +
", putReturnsNull=" + putReturnsNull() +
", removeReturnsNull=" + removeReturnsNull() +
", timeProvider=" + timeProvider() +
", bytesMarshallerFactory=" + pretty(bytesMarshallerFactory) +
", objectSerializer=" + pretty(objectSerializer) +
", keyBuilder=" + keyBuilder +
", valueBuilder=" + valueBuilder +
", eventListener=" + eventListener +
", defaultValue=" + defaultValue +
", defaultValueProvider=" + pretty(defaultValueProvider) +
", prepareValueBytes=" + pretty(prepareValueBytes) +
'}';
}
@SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
@Override
public boolean equals(Object o) {
return builderEquals(this, o);
}
@Override
public int hashCode() {
return toString().hashCode();
}
@Override
public ChronicleMapBuilder timeProvider(TimeProvider timeProvider) {
this.timeProvider = timeProvider;
return this;
}
TimeProvider timeProvider() {
return timeProvider;
}
BytesMarshallerFactory bytesMarshallerFactory() {
return bytesMarshallerFactory == null ?
bytesMarshallerFactory = new VanillaBytesMarshallerFactory() :
bytesMarshallerFactory;
}
@Override
public ChronicleMapBuilder bytesMarshallerFactory(
BytesMarshallerFactory bytesMarshallerFactory) {
this.bytesMarshallerFactory = bytesMarshallerFactory;
return this;
}
ObjectSerializer acquireObjectSerializer(ObjectSerializer defaultSerializer) {
return objectSerializer == null ?
BytesMarshallableSerializer.create(bytesMarshallerFactory(), defaultSerializer) :
objectSerializer;
}
/**
* {@inheritDoc}
*
Example:
{@code Map map =
* ChronicleMapBuilder.of(Key.class, Value.class)
* .entries(1_000_000)
* .averageKeySize(50).averageValueSize(200)
* // this class hasn't implemented yet, just for example
* .objectSerializer(new KryoObjectSerializer())
* .create();}
*
This serializer is used to serialize both keys and values, if they both require this:
* loosely typed, nullable, and custom {@linkplain #keyMarshaller(BytesMarshaller) key} and
* {@linkplain #valueMarshaller(BytesMarshaller) value} marshallers are not configured.
*/
@Override
public ChronicleMapBuilder objectSerializer(ObjectSerializer objectSerializer) {
this.objectSerializer = objectSerializer;
return this;
}
@Override
public ChronicleMapBuilder keyMarshaller(
@NotNull BytesMarshaller keyMarshaller) {
keyBuilder.marshaller(keyMarshaller);
return this;
}
@Override
public ChronicleMapBuilder keyMarshallers(
@NotNull BytesWriter keyWriter, @NotNull BytesReader keyReader) {
keyBuilder.writer(keyWriter);
keyBuilder.reader(keyReader);
return this;
}
@Override
public ChronicleMapBuilder keySizeMarshaller(@NotNull SizeMarshaller keySizeMarshaller) {
keyBuilder.sizeMarshaller(keySizeMarshaller);
return this;
}
/**
* @throws IllegalStateException {@inheritDoc}
* @see #valueDeserializationFactory(ObjectFactory)
*/
@Override
public ChronicleMapBuilder keyDeserializationFactory(
@NotNull ObjectFactory keyDeserializationFactory) {
keyBuilder.factory(keyDeserializationFactory);
return this;
}
@Override
public ChronicleMapBuilder immutableKeys() {
keyBuilder.instancesAreMutable(false);
return this;
}
/**
* Configures the {@code BytesMarshaller} used to serialize/deserialize values to/from off-heap
* memory in maps, created by this builder. See the
* section about serialization in ChronicleMap manual for more information.
*
* @param valueMarshaller the marshaller used to serialize values
* @return this builder back
* @see #valueMarshallers(BytesWriter, BytesReader)
* @see #objectSerializer(ObjectSerializer)
* @see #keyMarshaller(BytesMarshaller)
*/
public ChronicleMapBuilder valueMarshaller(
@NotNull BytesMarshaller valueMarshaller) {
valueBuilder.marshaller(valueMarshaller);
return this;
}
/**
* Configures the marshallers, used to serialize/deserialize values to/from off-heap memory in
* maps, created by this builder. See the
* section about serialization in ChronicleMap manual for more information.
*
Configuring marshalling this way results to a little bit more compact in-memory layout of
* the map, comparing to a single interface configuration: {@link #valueMarshaller(
*BytesMarshaller)}.
Passing {@link BytesInterop} instead of plain {@link BytesWriter}
* is, of cause, possible, but currently pointless for values.
*
* @param valueWriter the new value object → {@link Bytes} writer (interop) strategy
* @param valueReader the new {@link Bytes} → value object reader strategy
* @return this builder back
* @see #valueMarshaller(BytesMarshaller)
* @see #valueSizeMarshaller(SizeMarshaller)
* @see #keyMarshallers(BytesWriter, BytesReader)
*/
public ChronicleMapBuilder valueMarshallers(
@NotNull BytesWriter valueWriter, @NotNull BytesReader valueReader) {
valueBuilder.writer(valueWriter);
valueBuilder.reader(valueReader);
return this;
}
/**
* Configures the marshaller used to serialize actual value sizes to off-heap memory in maps,
* created by this builder.
Default value size marshaller is so-called {@linkplain
* SizeMarshallers#stopBit() stop bit encoding marshalling}, unless {@link
* #constantValueSizeBySample(Object)} or the builder statically knows the value size is
* constant -- {@link SizeMarshallers#constant(long)} or equivalents are used by default in
* these cases.
*
* @param valueSizeMarshaller the new marshaller, used to serialize actual value sizes to
* off-heap memory
* @return this builder back
* @see #keySizeMarshaller(SizeMarshaller)
*/
public ChronicleMapBuilder valueSizeMarshaller(
@NotNull SizeMarshaller valueSizeMarshaller) {
valueBuilder.sizeMarshaller(valueSizeMarshaller);
return this;
}
/**
* Configures factory which is used to create a new value instance, if value class is either
* {@link Byteable}, {@link BytesMarshallable} or {@link Externalizable} subclass, or value type
* is eligible for data value generation, or configured custom value reader is an instance of
* {@link DeserializationFactoryConfigurableBytesReader}, in maps, created by this builder.
*
Default value deserialization factory is {@link NewInstanceObjectFactory}, which creates a
* new value instance using {@link Class#newInstance()} default constructor. You could provide
* an {@link AllocateInstanceObjectFactory}, which uses {@code Unsafe.allocateInstance(Class)}
* (you might want to do this for better performance or if you don't want to initialize fields),
* or a factory which calls a value class constructor with some arguments, or a factory which
* internally delegates to instance pool or {@link ThreadLocal}, to reduce allocations.
*
* @param valueDeserializationFactory the value factory used to produce instances to deserialize
* data in
* @return this builder back
* @throws IllegalStateException if it is not possible to apply deserialization factory to value
* deserializers, currently configured for this builder
* @see #keyDeserializationFactory(ObjectFactory)
*/
public ChronicleMapBuilder valueDeserializationFactory(
@NotNull ObjectFactory valueDeserializationFactory) {
valueBuilder.factory(valueDeserializationFactory);
return this;
}
public ChronicleMapBuilder eventListener(MapEventListener eventListener) {
this.eventListener = eventListener;
return this;
}
MapEventListener eventListener() {
return eventListener;
}
public ChronicleMapBuilder bytesEventListener(BytesMapEventListener eventListener) {
this.bytesEventListener = eventListener;
return this;
}
BytesMapEventListener bytesEventListener() {
return bytesEventListener;
}
/**
* Specifies the value to be put for each key queried in {@link ChronicleMap#acquireUsing
* acquireUsing()} method, if the key is absent in the map, created by this builder.
This
* configuration overrides any previous {@link #defaultValueProvider(DefaultValueProvider)} and
* {@link #prepareDefaultValueBytes(PrepareValueBytes)} configurations to this builder.
*
* @param defaultValue the default value to be put to the map for absent keys during {@code
* acquireUsing()} calls
* @return this builder object back
* @see #defaultValueProvider(DefaultValueProvider)
* @see #prepareDefaultValueBytes(PrepareValueBytes)
*/
public ChronicleMapBuilder defaultValue(V defaultValue) {
if (defaultValue == null)
throw new IllegalArgumentException("default ChronicleMap value couldn't be null");
this.defaultValue = defaultValue;
this.defaultValueProvider = null;
this.prepareValueBytes = null;
return this;
}
/**
* Specifies the function to obtain a value for the key during {@link ChronicleMap#acquireUsing
* acquireUsing()} calls, if the key is absent in the map, created by this builder.
This
* configuration overrides any previous {@link #defaultValue(Object)} and {@link
* #prepareDefaultValueBytes(PrepareValueBytes)} configurations to this builder.
*
* @param defaultValueProvider the strategy to obtain a default value by the absent key
* @return this builder object back
* @see #defaultValue(Object)
* @see #prepareDefaultValueBytes(PrepareValueBytes)
*/
public ChronicleMapBuilder defaultValueProvider(
@NotNull DefaultValueProvider defaultValueProvider) {
this.defaultValueProvider = defaultValueProvider;
this.defaultValue = null;
this.prepareValueBytes = null;
return this;
}
/**
* Configures the procedure which is called on the bytes, which later the returned value is
* pointing to or deserialized from, if the key is absent, on {@link ChronicleMap#acquireUsing
* acquireUsing()} call on maps, created by this builder. See {@link PrepareValueBytes} for more
* information.
This method of value initialization on {@code acquireUsing()} calls is
* allowed only if value size is constant. Otherwise you should use either {@link
* #defaultValue(Object)} or {@link #defaultValueProvider(DefaultValueProvider)} methods.
*
This configuration overrides any previous {@link #defaultValue(Object)} and {@link
* #defaultValueProvider(DefaultValueProvider)} configurations to this builder.
The
* default preparation callback zeroes out the value bytes.
*
* @param prepareValueBytes what to do with the value bytes before assigning them into the
* {@link Byteable} value or deserializing the value from, to return
* from {@code acquireUsing()} call
* @return this builder back
* @throws IllegalStateException is value size is not constant
* @see PrepareValueBytes
* @see #defaultValue(Object)
* @see #defaultValueProvider(DefaultValueProvider)
*/
public ChronicleMapBuilder prepareDefaultValueBytes(
@NotNull PrepareValueBytes prepareValueBytes) {
this.prepareValueBytes = prepareValueBytes;
this.defaultValue = null;
this.defaultValueProvider = null;
checkPrepareValueBytesOnlyIfConstantValueSize();
return this;
}
private void checkPrepareValueBytesOnlyIfConstantValueSize() {
if (prepareValueBytes != null && !constantlySizedValues())
throw new IllegalStateException("Prepare value bytes could be used only if " +
"value size is constant");
}
PrepareValueBytesAsWriter prepareValueBytesAsWriter() {
PrepareValueBytes prepareValueBytes = this.prepareValueBytes;
if ((prepareValueBytes == null && defaultValueProvider() != null) ||
!constantlySizedValues())
return null;
long constantValueSize = constantValueSize();
if (prepareValueBytes == null)
prepareValueBytes = new ZeroOutValueBytes<>(constantValueSize);
return new PrepareValueBytesAsWriter<>(prepareValueBytes, constantValueSize);
}
/**
* Non-public because should be called only after {@link #preMapConstruction(boolean)}
*/
DefaultValueProvider defaultValueProvider() {
if (defaultValueProvider != null)
return defaultValueProvider;
if (defaultValue == null)
return null;
Object originalValueWriter = valueBuilder.interop();
Provider writerProvider = Provider.of(originalValueWriter.getClass());
ThreadLocalCopies copies = writerProvider.getCopies(null);
Object valueWriter = writerProvider.get(copies, originalValueWriter);
MetaProvider metaWriterProvider = valueBuilder.metaInteropProvider();
copies = metaWriterProvider.getCopies(copies);
MetaBytesWriter metaValueWriter = metaWriterProvider.get(copies,
valueBuilder.metaInterop(), valueWriter, defaultValue);
return new ConstantValueProvider(defaultValue, metaValueWriter, valueWriter);
}
@Override
public ChronicleMapBuilder replication(SingleChronicleHashReplication replication) {
this.singleHashReplication = replication;
return this;
}
@Override
public ChronicleMapBuilder replication(byte identifier) {
return replication(SingleChronicleHashReplication.builder().createWithId(identifier));
}
@Override
public ChronicleMapBuilder replication(
byte identifier, TcpTransportAndNetworkConfig tcpTransportAndNetwork) {
return replication(SingleChronicleHashReplication.builder()
.tcpTransportAndNetwork(tcpTransportAndNetwork).createWithId(identifier));
}
@Override
public ChronicleHashInstanceBuilder> instance() {
return new MapInstanceBuilder<>(this.clone(), singleHashReplication, null, null, null,
new AtomicBoolean(false));
}
@Override
public ChronicleMap createPersistedTo(File file) throws IOException {
// clone() to make this builder instance thread-safe, because createWithFile() method
// computes some state based on configurations, but doesn't synchronize on configuration
// changes.
return clone().createWithFile(file, singleHashReplication, null);
}
@Override
public ChronicleMap create() {
// clone() to make this builder instance thread-safe, because createWithoutFile() method
// computes some state based on configurations, but doesn't synchronize on configuration
// changes.
return clone().createWithoutFile(singleHashReplication, null);
}
ChronicleMap create(MapInstanceBuilder ib) throws IOException {
if (ib.file != null) {
return createWithFile(ib.file, ib.singleHashReplication, ib.channel);
} else {
return createWithoutFile(ib.singleHashReplication, ib.channel);
}
}
ChronicleMap createWithFile(File file, SingleChronicleHashReplication singleHashReplication,
ReplicationChannel channel) throws IOException {
pushingToMapEventListener();
for (int i = 0; i < 10; i++) {
if (file.exists() && file.length() > 0) {
try (FileInputStream fis = new FileInputStream(file);
ObjectInputStream ois = new ObjectInputStream(fis)) {
Object m;
byte serialization = ois.readByte();
if (serialization == XML_SERIALIZATION) {
m = deserializeHeaderViaXStream(ois);
} else if (serialization == BINARY_SERIALIZATION) {
try {
m = ois.readObject();
} catch (ClassNotFoundException e) {
throw new AssertionError(e);
}
} else {
throw new IOException("Unknown map header serialization type: " +
serialization);
}
VanillaChronicleMap map =
(VanillaChronicleMap) m;
map.headerSize = roundUpMapHeaderSize(fis.getChannel().position());
map.createMappedStoreAndSegments(file);
// This is needed to property initialize key and value serialization builders,
// which are later used in replication
// TODO don't use SerializationBuilders in replication, extract marshallers
// needed to transmit to stateless clients directly from map instance
preMapConstruction(singleHashReplication != null || channel != null);
return establishReplication(map, singleHashReplication, channel);
}
}
if (file.createNewFile() || file.length() == 0) {
break;
}
try {
Thread.sleep(100);
} catch (InterruptedException e) {
throw new IOException(e);
}
}
// new file
if (!file.exists())
throw new FileNotFoundException("Unable to create " + file);
VanillaChronicleMap map = newMap(singleHashReplication, channel);
try (FileOutputStream fos = new FileOutputStream(file);
ObjectOutputStream oos = new ObjectOutputStream(fos)) {
if (!trySerializeHeaderViaXStream(map, oos)) {
oos.writeByte(BINARY_SERIALIZATION);
oos.writeObject(map);
}
oos.flush();
map.headerSize = roundUpMapHeaderSize(fos.getChannel().position());
map.createMappedStoreAndSegments(file);
}
return establishReplication(map, singleHashReplication, channel);
}
private static boolean trySerializeHeaderViaXStream(
VanillaChronicleMap map, ObjectOutputStream oos) throws IOException {
Class xStreamClass;
try {
xStreamClass =
Class.forName("net.openhft.xstream.MapHeaderSerializationXStream");
} catch (ClassNotFoundException e) {
xStreamClass = null;
}
if (xStreamClass == null) {
LOG.info("xStream not found, use binary ChronicleMap header serialization");
return false;
}
try {
oos.writeByte(XML_SERIALIZATION);
Method toXML = xStreamClass.getMethod("toXML", Object.class, OutputStream.class);
toXML.invoke(xStreamClass.newInstance(), map, oos);
return true;
} catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException |
InstantiationException e) {
throw new AssertionError(e);
}
}
private static Object deserializeHeaderViaXStream(ObjectInputStream ois) {
try {
Class xStreamClass =
Class.forName("net.openhft.xstream.MapHeaderSerializationXStream");
Method fromXML = xStreamClass.getMethod("fromXML", InputStream.class);
return fromXML.invoke(xStreamClass.newInstance(), ois);
} catch (ClassNotFoundException | NoSuchMethodException | InvocationTargetException |
IllegalAccessException | InstantiationException e) {
throw new AssertionError(e);
}
}
ChronicleMap createWithoutFile(
SingleChronicleHashReplication singleHashReplication, ReplicationChannel channel) {
try {
pushingToMapEventListener();
VanillaChronicleMap map = newMap(singleHashReplication, channel);
map.warnOnWindows();
BytesStore bytesStore = new DirectStore(JDKObjectSerializer.INSTANCE,
map.sizeInBytes(), true);
map.createMappedStoreAndSegments(bytesStore);
return establishReplication(map, singleHashReplication, channel);
} catch (IOException e) {
// file-less version should never trigger an IOException.
throw new AssertionError(e);
}
}
private void pushingToMapEventListener() {
if (pushToAddresses == null || pushToAddresses.length == 0) {
return;
}
try {
Class pmel = Class.forName(
"com.higherfrequencytrading.chronicle.enterprise.map.PushingMapEventListener");
Constructor constructor = pmel.getConstructor(ChronicleMap[].class);
// create a stateless client for each address
ChronicleMap[] statelessClients = new ChronicleMap[pushToAddresses.length];
ChronicleMapBuilder cmb = clone();
cmb.pushTo((InetSocketAddress[]) null);
for (int i = 0; i < pushToAddresses.length; i++) {
statelessClients[i] = ChronicleMapStatelessClientBuilder.of(pushToAddresses[i])
.create();
}
eventListener =
(MapEventListener) constructor.newInstance((Object) statelessClients);
} catch (ClassNotFoundException e) {
LoggerFactory.getLogger(getClass().getName())
.warn("Chronicle Enterprise not found in the class path");
} catch (Exception e) {
LoggerFactory.getLogger(getClass().getName())
.error("PushingMapEventListener failed to load", e);
}
}
private VanillaChronicleMap newMap(
SingleChronicleHashReplication singleHashReplication, ReplicationChannel channel)
throws IOException {
boolean replicated = singleHashReplication != null || channel != null;
preMapConstruction(replicated);
if (replicated) {
AbstractReplication replication;
if (singleHashReplication != null) {
replication = singleHashReplication;
} else {
replication = channel.hub();
}
return new ReplicatedChronicleMap,
V, Object, MetaBytesInterop>(this, replication);
} else {
return new VanillaChronicleMap,
V, Object, MetaBytesInterop>(this);
}
}
void preMapConstruction(boolean replicated) {
keyBuilder.objectSerializer(acquireObjectSerializer(JDKObjectSerializer.INSTANCE));
valueBuilder.objectSerializer(acquireObjectSerializer(JDKObjectSerializer.INSTANCE));
double largeKeySize = averageKeySize();
if (!constantlySizedKeys())
largeKeySize *= figureBufferAllocationFactor();
keyBuilder.maxSize(round(largeKeySize));
double largeValueSize = averageValueSize();
if (!constantlySizedValues())
largeValueSize *= figureBufferAllocationFactor();
valueBuilder.maxSize(round(largeValueSize));
if (sampleKey != null)
keyBuilder.constantSizeBySample(sampleKey);
if (sampleValue != null)
valueBuilder.constantSizeBySample(sampleValue);
stateChecks();
}
private void stateChecks() {
if (strictStateChecks) {
if (entries < 0)
throw new IllegalStateException("Entries must be specified");
if (!constantlySizedKeys() && !isDefined(averageKeySize))
throw new IllegalStateException("No info about key size");
if (!constantlySizedValues() && !isDefined(averageValueSize))
throw new IllegalStateException("No info about value size");
}
checkAlignmentOnlyIfValuesPossiblyReferenceOffHeap();
checkPrepareValueBytesOnlyIfConstantValueSize();
checkActualChunksPerSegmentIsConfiguredOnlyIfOtherLowLevelConfigsAreManual();
checkActualChunksPerSegmentGreaterOrEqualToEntries();
}
private ChronicleMap establishReplication(
VanillaChronicleMap map,
SingleChronicleHashReplication singleHashReplication,
ReplicationChannel channel) throws IOException {
if (map instanceof ReplicatedChronicleMap) {
if (singleHashReplication != null && channel != null) {
throw new AssertionError("Only one non-null replication should be passed");
}
ReplicatedChronicleMap result = (ReplicatedChronicleMap) map;
List replicators = new ArrayList<>(3);
if (singleHashReplication != null) {
if (singleHashReplication.tcpTransportAndNetwork() != null)
replicators.add(Replicators.tcp(singleHashReplication));
if (singleHashReplication.udpTransport() != null)
replicators.add(Replicators.udp(singleHashReplication.udpTransport()));
if (singleHashReplication.engineReplicator() != null)
replicators.add(Replicators.engineReplicaton(singleHashReplication));
} else {
ReplicationHub hub = channel.hub();
ChannelProvider provider = ChannelProvider.getProvider(hub);
ChannelProvider.ChronicleChannel ch = provider.createChannel(channel.channelId());
replicators.add(ch);
}
for (Replicator replicator : replicators) {
Closeable token = replicator.applyTo(this, result, result, map);
if (replicators.size() == 1 && token.getClass() == UdpReplicator.class) {
LOG.warn(Replicators.ONLY_UDP_WARN_MESSAGE);
}
result.addCloseable(token);
}
}
return map;
}
private int figureBufferAllocationFactor() {
// if expected map size is about 1000, seems rather wasteful to allocate
// key and value serialization buffers each x64 of expected entry size..
return (int) Math.min(Math.max(2L, entries() >> 10),
Math.min(64, maxChunksPerEntry()));
}
}