org.apache.jackrabbit.oak.plugins.segment.SegmentNodeStoreService Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jackrabbit.oak.plugins.segment;
import static com.google.common.base.Preconditions.checkState;
import static java.util.Collections.emptyMap;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.apache.jackrabbit.oak.commons.PropertiesUtil.toBoolean;
import static org.apache.jackrabbit.oak.commons.PropertiesUtil.toInteger;
import static org.apache.jackrabbit.oak.commons.PropertiesUtil.toLong;
import static org.apache.jackrabbit.oak.osgi.OsgiUtil.lookupConfigurationThenFramework;
import static org.apache.jackrabbit.oak.plugins.segment.compaction.CompactionStrategy.CLEANUP_DEFAULT;
import static org.apache.jackrabbit.oak.plugins.segment.compaction.CompactionStrategy.CLONE_BINARIES_DEFAULT;
import static org.apache.jackrabbit.oak.plugins.segment.compaction.CompactionStrategy.FORCE_AFTER_FAIL_DEFAULT;
import static org.apache.jackrabbit.oak.plugins.segment.compaction.CompactionStrategy.GAIN_THRESHOLD_DEFAULT;
import static org.apache.jackrabbit.oak.plugins.segment.compaction.CompactionStrategy.MEMORY_THRESHOLD_DEFAULT;
import static org.apache.jackrabbit.oak.plugins.segment.compaction.CompactionStrategy.PAUSE_DEFAULT;
import static org.apache.jackrabbit.oak.plugins.segment.compaction.CompactionStrategy.PERSIST_COMPACTION_MAP_DEFAULT;
import static org.apache.jackrabbit.oak.plugins.segment.compaction.CompactionStrategy.RETRY_COUNT_DEFAULT;
import static org.apache.jackrabbit.oak.plugins.segment.compaction.CompactionStrategy.TIMESTAMP_DEFAULT;
import static org.apache.jackrabbit.oak.spi.blob.osgi.SplitBlobStoreService.ONLY_STANDALONE_TARGET;
import static org.apache.jackrabbit.oak.spi.whiteboard.WhiteboardUtils.registerMBean;
import static org.apache.jackrabbit.oak.spi.whiteboard.WhiteboardUtils.scheduleWithFixedDelay;
import java.io.ByteArrayInputStream;
import java.io.Closeable;
import java.io.File;
import java.io.IOException;
import java.util.Collections;
import java.util.Dictionary;
import java.util.Hashtable;
import java.util.concurrent.Callable;
import java.util.concurrent.TimeUnit;
import org.apache.felix.scr.annotations.Activate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.ConfigurationPolicy;
import org.apache.felix.scr.annotations.Deactivate;
import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.PropertyOption;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.ReferenceCardinality;
import org.apache.felix.scr.annotations.ReferencePolicy;
import org.apache.jackrabbit.commons.SimpleValueFactory;
import org.apache.jackrabbit.oak.api.Descriptors;
import org.apache.jackrabbit.oak.api.jmx.CacheStatsMBean;
import org.apache.jackrabbit.oak.api.jmx.CheckpointMBean;
import org.apache.jackrabbit.oak.cache.CacheStats;
import org.apache.jackrabbit.oak.osgi.ObserverTracker;
import org.apache.jackrabbit.oak.osgi.OsgiWhiteboard;
import org.apache.jackrabbit.oak.plugins.blob.BlobGC;
import org.apache.jackrabbit.oak.plugins.blob.BlobGCMBean;
import org.apache.jackrabbit.oak.plugins.blob.BlobGarbageCollector;
import org.apache.jackrabbit.oak.plugins.blob.MarkSweepGarbageCollector;
import org.apache.jackrabbit.oak.plugins.blob.SharedDataStore;
import org.apache.jackrabbit.oak.plugins.blob.datastore.SharedDataStoreUtils;
import org.apache.jackrabbit.oak.plugins.blob.datastore.SharedDataStoreUtils.SharedStoreRecordType;
import org.apache.jackrabbit.oak.plugins.identifier.ClusterRepositoryInfo;
import org.apache.jackrabbit.oak.plugins.segment.compaction.CompactionStrategy;
import org.apache.jackrabbit.oak.plugins.segment.compaction.CompactionStrategy.CleanupType;
import org.apache.jackrabbit.oak.plugins.segment.compaction.CompactionStrategyMBean;
import org.apache.jackrabbit.oak.plugins.segment.compaction.DefaultCompactionStrategyMBean;
import org.apache.jackrabbit.oak.plugins.segment.file.FileStore;
import org.apache.jackrabbit.oak.plugins.segment.file.FileStore.Builder;
import org.apache.jackrabbit.oak.plugins.segment.file.FileStoreGCMonitor;
import org.apache.jackrabbit.oak.plugins.segment.file.FileStoreStatsMBean;
import org.apache.jackrabbit.oak.plugins.segment.file.GCMonitorMBean;
import org.apache.jackrabbit.oak.spi.blob.BlobStore;
import org.apache.jackrabbit.oak.spi.blob.GarbageCollectableBlobStore;
import org.apache.jackrabbit.oak.spi.commit.Observable;
import org.apache.jackrabbit.oak.spi.commit.Observer;
import org.apache.jackrabbit.oak.spi.gc.GCMonitor;
import org.apache.jackrabbit.oak.spi.gc.GCMonitorTracker;
import org.apache.jackrabbit.oak.spi.state.NodeStore;
import org.apache.jackrabbit.oak.spi.state.ProxyNodeStore;
import org.apache.jackrabbit.oak.spi.state.RevisionGC;
import org.apache.jackrabbit.oak.spi.state.RevisionGCMBean;
import org.apache.jackrabbit.oak.spi.whiteboard.CompositeRegistration;
import org.apache.jackrabbit.oak.spi.whiteboard.Registration;
import org.apache.jackrabbit.oak.spi.whiteboard.WhiteboardExecutor;
import org.apache.jackrabbit.oak.stats.Clock;
import org.apache.jackrabbit.oak.stats.StatisticsProvider;
import org.apache.jackrabbit.oak.util.GenericDescriptors;
import org.osgi.framework.Constants;
import org.osgi.framework.ServiceRegistration;
import org.osgi.service.component.ComponentContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* An OSGi wrapper for the segment node store.
*/
@Component(policy = ConfigurationPolicy.REQUIRE,
metatype = true,
label = "Apache Jackrabbit Oak Segment NodeStore Service",
description = "NodeStore implementation based on Document model. For configuration option refer " +
"to http://jackrabbit.apache.org/oak/docs/osgi_config.html#SegmentNodeStore. Note that for system " +
"stability purpose it is advisable to not change these settings at runtime. Instead the config change " +
"should be done via file system based config file and this view should ONLY be used to determine which " +
"options are supported"
)
public class SegmentNodeStoreService extends ProxyNodeStore
implements Observable, SegmentStoreProvider {
public static final String NAME = "name";
@Property(
label = "Directory",
description="Directory location used to store the segment tar files. If not specified then looks " +
"for framework property 'repository.home' otherwise use a subdirectory with name 'tarmk'"
)
public static final String DIRECTORY = "repository.home";
@Property(
label = "Mode",
description="TarMK mode (64 for memory mapping, 32 for normal file access)"
)
public static final String MODE = "tarmk.mode";
@Property(
intValue = 256,
label = "Maximum Tar File Size (MB)",
description = "TarMK maximum file size (MB)"
)
public static final String SIZE = "tarmk.size";
@Property(
intValue = 256,
label = "Cache size (MB)",
description = "Cache size for storing most recently used Segments"
)
public static final String CACHE = "cache";
@Property(
boolValue = CLONE_BINARIES_DEFAULT,
label = "Clone Binaries",
description = "Clone the binary segments while performing compaction"
)
public static final String COMPACTION_CLONE_BINARIES = "compaction.cloneBinaries";
@Property(options = {
@PropertyOption(name = "CLEAN_ALL", value = "CLEAN_ALL"),
@PropertyOption(name = "CLEAN_NONE", value = "CLEAN_NONE"),
@PropertyOption(name = "CLEAN_OLD", value = "CLEAN_OLD") },
value = "CLEAN_OLD",
label = "Cleanup Strategy",
description = "Cleanup strategy used for live in memory segment references while performing cleanup. "+
"1. CLEAN_NONE: All in memory references are considered valid, " +
"2. CLEAN_OLD: Only in memory references older than a " +
"certain age are considered valid (compaction.cleanup.timestamp), " +
"3. CLEAN_ALL: None of the in memory references are considered valid"
)
public static final String COMPACTION_CLEANUP = "compaction.cleanup";
@Property(
longValue = TIMESTAMP_DEFAULT,
label = "Reference expiry time (ms)",
description = "Time interval in ms beyond which in memory segment references would be ignored " +
"while performing cleanup"
)
public static final String COMPACTION_CLEANUP_TIMESTAMP = "compaction.cleanup.timestamp";
@Property(
byteValue = MEMORY_THRESHOLD_DEFAULT,
label = "Memory Multiplier",
description = "TarMK compaction available memory multiplier needed to run compaction"
)
public static final String COMPACTION_MEMORY_THRESHOLD = "compaction.memoryThreshold";
@Property(
byteValue = GAIN_THRESHOLD_DEFAULT,
label = "Compaction gain threshold",
description = "TarMK compaction gain threshold. The gain estimation prevents compaction from running " +
"if the provided threshold is not met. Value represents a percentage so an input beween 0 and 100 is expected."
)
public static final String COMPACTION_GAIN_THRESHOLD = "compaction.gainThreshold";
@Property(
boolValue = PAUSE_DEFAULT,
label = "Pause Compaction",
description = "When enabled compaction would not be performed"
)
public static final String PAUSE_COMPACTION = "pauseCompaction";
@Property(
intValue = RETRY_COUNT_DEFAULT,
label = "Compaction Retries",
description = "Number of tries to compact concurrent commits on top of already " +
"compacted commits"
)
public static final String COMPACTION_RETRY_COUNT = "compaction.retryCount";
@Property(
boolValue = FORCE_AFTER_FAIL_DEFAULT,
label = "Force Compaction",
description = "Whether or not to force compact concurrent commits on top of already " +
" compacted commits after the maximum number of retries has been reached. " +
"Force committing tries to exclusively write lock the node store."
)
public static final String COMPACTION_FORCE_AFTER_FAIL = "compaction.forceAfterFail";
public static final int COMPACTION_LOCK_WAIT_TIME_DEFAULT = 60;
@Property(
intValue = COMPACTION_LOCK_WAIT_TIME_DEFAULT,
label = "Compaction Lock Wait Time",
description = "Number of seconds to wait for the lock for committing compacted changes " +
"respectively to wait for the exclusive write lock for force committing."
)
public static final String COMPACTION_LOCK_WAIT_TIME = "compaction.lockWaitTime";
@Property(
boolValue = PERSIST_COMPACTION_MAP_DEFAULT,
label = "Persist Compaction Map",
description = "When enabled the compaction map would be persisted instead of being " +
"held in memory"
)
public static final String PERSIST_COMPACTION_MAP = "persistCompactionMap";
@Property(
boolValue = false,
label = "Standby Mode",
description = "Flag indicating that this component will not register as a NodeStore but just as a NodeStoreProvider"
)
public static final String STANDBY = "standby";
@Property(boolValue = false,
label = "Custom BlobStore",
description = "Boolean value indicating that a custom BlobStore is to be used. " +
"By default large binary content would be stored within segment tar files"
)
public static final String CUSTOM_BLOB_STORE = "customBlobStore";
private final Logger log = LoggerFactory.getLogger(getClass());
private String name;
private FileStore store;
private volatile SegmentNodeStore segmentNodeStore;
private ObserverTracker observerTracker;
private GCMonitorTracker gcMonitor;
private ComponentContext context;
private CompactionStrategy compactionStrategy;
@Reference(cardinality = ReferenceCardinality.OPTIONAL_UNARY,
policy = ReferencePolicy.DYNAMIC, target = ONLY_STANDALONE_TARGET)
private volatile BlobStore blobStore;
@Reference
private StatisticsProvider statisticsProvider = StatisticsProvider.NOOP;
private ServiceRegistration storeRegistration;
private ServiceRegistration providerRegistration;
private Registration checkpointRegistration;
private Registration revisionGCRegistration;
private Registration blobGCRegistration;
private Registration compactionStrategyRegistration;
private Registration segmentCacheMBean;
private Registration stringCacheMBean;
private Registration fsgcMonitorMBean;
private Registration fileStoreStatsMBean;
private WhiteboardExecutor executor;
private boolean customBlobStore;
/**
* Blob modified before this time duration would be considered for Blob GC
*/
private static final long DEFAULT_BLOB_GC_MAX_AGE = 24 * 60 * 60;
@Property (longValue = DEFAULT_BLOB_GC_MAX_AGE,
label = "Blob GC Max Age (in secs)",
description = "Blob Garbage Collector (GC) logic will only consider those blobs for GC which " +
"are not accessed recently (currentTime - lastModifiedTime > blobGcMaxAgeInSecs). For " +
"example as per default only those blobs which have been created 24 hrs ago will be " +
"considered for GC"
)
public static final String PROP_BLOB_GC_MAX_AGE = "blobGcMaxAgeInSecs";
@Override
protected SegmentNodeStore getNodeStore() {
checkState(segmentNodeStore != null, "service must be activated when used");
return segmentNodeStore;
}
@Activate
public void activate(ComponentContext context) throws IOException {
this.context = context;
this.customBlobStore = Boolean.parseBoolean(property(CUSTOM_BLOB_STORE));
if (blobStore == null && customBlobStore) {
log.info("BlobStore use enabled. SegmentNodeStore would be initialized when BlobStore would be available");
} else {
registerNodeStore();
}
}
protected void bindBlobStore(BlobStore blobStore) throws IOException {
this.blobStore = blobStore;
registerNodeStore();
}
protected void unbindBlobStore(BlobStore blobStore){
this.blobStore = null;
unregisterNodeStore();
}
@Deactivate
public void deactivate() {
unregisterNodeStore();
synchronized (this) {
if (observerTracker != null) {
observerTracker.stop();
}
if (gcMonitor != null) {
gcMonitor.stop();
}
segmentNodeStore = null;
if (store != null) {
store.close();
store = null;
}
}
}
private synchronized void registerNodeStore() throws IOException {
if (registerSegmentStore()) {
if (toBoolean(property(STANDBY), false)) {
return;
}
if (registerSegmentNodeStore()) {
Dictionary props = new Hashtable();
props.put(Constants.SERVICE_PID, SegmentNodeStore.class.getName());
props.put("oak.nodestore.description", new String[]{"nodeStoreType=segment"});
storeRegistration = context.getBundleContext().registerService(NodeStore.class.getName(), this, props);
}
}
}
private boolean registerSegmentStore() throws IOException {
if (context == null) {
log.info("Component still not activated. Ignoring the initialization call");
return false;
}
OsgiWhiteboard whiteboard = new OsgiWhiteboard(context.getBundleContext());
// Listen for GCMonitor services
gcMonitor = new GCMonitorTracker();
gcMonitor.start(whiteboard);
// Build the FileStore
Builder builder = FileStore.newFileStore(getDirectory())
.withCacheSize(getCacheSize())
.withMaxFileSize(getMaxFileSize())
.withMemoryMapping(getMode().equals("64"))
.withGCMonitor(gcMonitor)
.withStatisticsProvider(statisticsProvider);
if (customBlobStore) {
log.info("Initializing SegmentNodeStore with BlobStore [{}]", blobStore);
builder.withBlobStore(blobStore);
}
store = builder.create();
// Create a compaction strategy
compactionStrategy = newCompactionStrategy();
// Expose an MBean to provide information about the compaction strategy
compactionStrategyRegistration = registerMBean(
whiteboard,
CompactionStrategyMBean.class,
new DefaultCompactionStrategyMBean(compactionStrategy),
CompactionStrategyMBean.TYPE,
"Segment node store compaction strategy settings"
);
// Let the FileStore be aware of the compaction strategy
store.setCompactionStrategy(compactionStrategy);
// Expose stats about the segment cache
CacheStats segmentCacheStats = store.getTracker().getSegmentCacheStats();
segmentCacheMBean = registerMBean(
whiteboard,
CacheStatsMBean.class,
segmentCacheStats,
CacheStats.TYPE,
segmentCacheStats.getName()
);
// Expose stats about the string cache, if available
CacheStats stringCacheStats = store.getTracker().getStringCacheStats();
if (stringCacheStats != null) {
stringCacheMBean = registerMBean(
whiteboard,
CacheStatsMBean.class,
stringCacheStats,CacheStats.TYPE,
stringCacheStats.getName()
);
}
// Listen for Executor services on the whiteboard
executor = new WhiteboardExecutor();
executor.start(whiteboard);
// Expose an MBean to trigger garbage collection
Runnable triggerGarbageCollection = new Runnable() {
@Override
public void run() {
store.gc();
}
};
revisionGCRegistration = registerMBean(
whiteboard,
RevisionGCMBean.class,
new RevisionGC(triggerGarbageCollection, executor),
RevisionGCMBean.TYPE,
"Segment node store revision garbage collection"
);
// Expose statistics about the FileStore
fileStoreStatsMBean = registerMBean(
whiteboard,
FileStoreStatsMBean.class,
store.getStats(),
FileStoreStatsMBean.TYPE,
"FileStore statistics"
);
// Register a monitor for the garbage collection of the FileStore
FileStoreGCMonitor fsgcm = new FileStoreGCMonitor(Clock.SIMPLE);
fsgcMonitorMBean = new CompositeRegistration(
whiteboard.register(GCMonitor.class, fsgcm, emptyMap()),
registerMBean(
whiteboard,
GCMonitorMBean.class,
fsgcm,
GCMonitorMBean.TYPE,
"File Store garbage collection monitor"
),
scheduleWithFixedDelay(whiteboard, fsgcm, 1)
);
// Register a factory service to expose the FileStore
providerRegistration = context.getBundleContext().registerService(SegmentStoreProvider.class.getName(), this, null);
return true;
}
private CompactionStrategy newCompactionStrategy() {
boolean pauseCompaction = toBoolean(property(PAUSE_COMPACTION), PAUSE_DEFAULT);
boolean cloneBinaries = toBoolean(property(COMPACTION_CLONE_BINARIES), CLONE_BINARIES_DEFAULT);
long cleanupTs = toLong(property(COMPACTION_CLEANUP_TIMESTAMP), TIMESTAMP_DEFAULT);
int retryCount = toInteger(property(COMPACTION_RETRY_COUNT), RETRY_COUNT_DEFAULT);
boolean forceAfterFail = toBoolean(property(COMPACTION_FORCE_AFTER_FAIL), FORCE_AFTER_FAIL_DEFAULT);
final int lockWaitTime = toInteger(property(COMPACTION_LOCK_WAIT_TIME), COMPACTION_LOCK_WAIT_TIME_DEFAULT);
boolean persistCompactionMap = toBoolean(property(PERSIST_COMPACTION_MAP), PERSIST_COMPACTION_MAP_DEFAULT);
CleanupType cleanupType = getCleanUpType();
byte memoryThreshold = getMemoryThreshold();
byte gainThreshold = getGainThreshold();
// This is indeed a dirty hack, but it's needed to break a circular
// dependency between different components. The FileStore needs the
// CompactionStrategy, the CompactionStrategy needs the
// SegmentNodeStore, and the SegmentNodeStore needs the FileStore.
CompactionStrategy compactionStrategy = new CompactionStrategy(pauseCompaction, cloneBinaries, cleanupType, cleanupTs, memoryThreshold) {
@Override
public boolean compacted(Callable setHead) throws Exception {
// Need to guard against concurrent commits to avoid
// mixed segments. See OAK-2192.
return segmentNodeStore.locked(setHead, lockWaitTime, SECONDS);
}
};
compactionStrategy.setRetryCount(retryCount);
compactionStrategy.setForceAfterFail(forceAfterFail);
compactionStrategy.setPersistCompactionMap(persistCompactionMap);
compactionStrategy.setGainThreshold(gainThreshold);
return compactionStrategy;
}
private boolean registerSegmentNodeStore() throws IOException {
Dictionary properties = context.getProperties();
name = String.valueOf(properties.get(NAME));
final long blobGcMaxAgeInSecs = toLong(property(PROP_BLOB_GC_MAX_AGE), DEFAULT_BLOB_GC_MAX_AGE);
OsgiWhiteboard whiteboard = new OsgiWhiteboard(context.getBundleContext());
SegmentNodeStoreBuilder nodeStoreBuilder = SegmentNodeStore.newSegmentNodeStore(store);
nodeStoreBuilder.withCompactionStrategy(compactionStrategy);
segmentNodeStore = nodeStoreBuilder.create();
observerTracker = new ObserverTracker(segmentNodeStore);
observerTracker.start(context.getBundleContext());
checkpointRegistration = registerMBean(whiteboard, CheckpointMBean.class, new SegmentCheckpointMBean(segmentNodeStore),
CheckpointMBean.TYPE, "Segment node store checkpoint management");
// ensure a clusterId is initialized
// and expose it as 'oak.clusterid' repository descriptor
GenericDescriptors clusterIdDesc = new GenericDescriptors();
clusterIdDesc.put(ClusterRepositoryInfo.OAK_CLUSTERID_REPOSITORY_DESCRIPTOR_KEY,
new SimpleValueFactory().createValue(
ClusterRepositoryInfo.getOrCreateId(segmentNodeStore)), true, false);
whiteboard.register(Descriptors.class, clusterIdDesc, Collections.emptyMap());
// If a shared data store register the repo id in the data store
String repoId = "";
if (SharedDataStoreUtils.isShared(blobStore)) {
try {
repoId = ClusterRepositoryInfo.getOrCreateId(segmentNodeStore);
((SharedDataStore) blobStore).addMetadataRecord(new ByteArrayInputStream(new byte[0]),
SharedStoreRecordType.REPOSITORY.getNameFromId(repoId));
} catch (Exception e) {
throw new IOException("Could not register a unique repositoryId", e);
}
}
if (store.getBlobStore() instanceof GarbageCollectableBlobStore) {
BlobGarbageCollector gc = new MarkSweepGarbageCollector(
new SegmentBlobReferenceRetriever(store.getTracker()),
(GarbageCollectableBlobStore) store.getBlobStore(),
executor,
TimeUnit.SECONDS.toMillis(blobGcMaxAgeInSecs),
repoId
);
blobGCRegistration = registerMBean(
whiteboard,
BlobGCMBean.class,
new BlobGC(gc, executor),
BlobGCMBean.TYPE,
"Segment node store blob garbage collection"
);
}
log.info("SegmentNodeStore initialized");
return true;
}
private void unregisterNodeStore() {
if (segmentCacheMBean != null) {
segmentCacheMBean.unregister();
segmentCacheMBean = null;
}
if (stringCacheMBean != null) {
stringCacheMBean.unregister();
stringCacheMBean = null;
}
if(providerRegistration != null){
providerRegistration.unregister();
providerRegistration = null;
}
if(storeRegistration != null){
storeRegistration.unregister();
storeRegistration = null;
}
if (checkpointRegistration != null) {
checkpointRegistration.unregister();
checkpointRegistration = null;
}
if (revisionGCRegistration != null) {
revisionGCRegistration.unregister();
revisionGCRegistration = null;
}
if (blobGCRegistration != null) {
blobGCRegistration.unregister();
blobGCRegistration = null;
}
if (compactionStrategyRegistration != null) {
compactionStrategyRegistration.unregister();
compactionStrategyRegistration = null;
}
if (fsgcMonitorMBean != null) {
fsgcMonitorMBean.unregister();
fsgcMonitorMBean = null;
}
if (fileStoreStatsMBean != null) {
fileStoreStatsMBean.unregister();
fileStoreStatsMBean = null;
}
if (executor != null) {
executor.stop();
executor = null;
}
}
private File getBaseDirectory() {
String directory = property(DIRECTORY);
if (directory != null) {
return new File(directory);
}
return new File("tarmk");
}
private File getDirectory() {
return new File(getBaseDirectory(), "segmentstore");
}
private String getMode() {
String mode = property(MODE);
if (mode != null) {
return mode;
}
return System.getProperty(MODE, System.getProperty("sun.arch.data.model", "32"));
}
private String getCacheSizeProperty() {
String cache = property(CACHE);
if (cache != null) {
return cache;
}
return System.getProperty(CACHE);
}
private int getCacheSize() {
return Integer.parseInt(getCacheSizeProperty());
}
private String getMaxFileSizeProperty() {
String size = property(SIZE);
if (size != null) {
return size;
}
return System.getProperty(SIZE, "256");
}
private int getMaxFileSize() {
return Integer.parseInt(getMaxFileSizeProperty());
}
private CleanupType getCleanUpType() {
String cleanupType = property(COMPACTION_CLEANUP);
if (cleanupType == null) {
return CLEANUP_DEFAULT;
}
return CleanupType.valueOf(cleanupType);
}
private byte getMemoryThreshold() {
String mt = property(COMPACTION_MEMORY_THRESHOLD);
if (mt == null) {
return MEMORY_THRESHOLD_DEFAULT;
}
return Byte.valueOf(mt);
}
private byte getGainThreshold() {
String gt = property(COMPACTION_GAIN_THRESHOLD);
if (gt == null) {
return GAIN_THRESHOLD_DEFAULT;
}
return Byte.valueOf(gt);
}
private String property(String name) {
return lookupConfigurationThenFramework(context, name);
}
/**
* needed for situations where you have to unwrap the
* SegmentNodeStoreService, to get the SegmentStore, like the failover
*/
@Override
public SegmentStore getSegmentStore() {
return store;
}
//------------------------------------------------------------< Observable >---
@Override
public Closeable addObserver(Observer observer) {
return getNodeStore().addObserver(observer);
}
//------------------------------------------------------------< Object >--
@Override
public String toString() {
return name + ": " + segmentNodeStore;
}
}
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