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/**
* 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.activemq.openwire;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import org.apache.activemq.command.CommandTypes;
import org.apache.activemq.command.DataStructure;
import org.apache.activemq.command.WireFormatInfo;
import org.apache.activemq.util.ByteSequence;
import org.apache.activemq.util.ByteSequenceData;
import org.apache.activemq.util.DataByteArrayInputStream;
import org.apache.activemq.util.DataByteArrayOutputStream;
import org.apache.activemq.util.IOExceptionSupport;
import org.apache.activemq.wireformat.WireFormat;
/**
*
*
*/
public final class OpenWireFormat implements WireFormat {
public static final int DEFAULT_STORE_VERSION = CommandTypes.PROTOCOL_STORE_VERSION;
public static final int DEFAULT_WIRE_VERSION = CommandTypes.PROTOCOL_VERSION;
public static final int DEFAULT_LEGACY_VERSION = CommandTypes.PROTOCOL_LEGACY_STORE_VERSION;
public static final long DEFAULT_MAX_FRAME_SIZE = Long.MAX_VALUE;
static final byte NULL_TYPE = CommandTypes.NULL;
private static final int MARSHAL_CACHE_SIZE = Short.MAX_VALUE / 2;
private static final int MARSHAL_CACHE_FREE_SPACE = 100;
private DataStreamMarshaller dataMarshallers[];
private int version;
private boolean stackTraceEnabled;
private boolean tcpNoDelayEnabled;
private boolean cacheEnabled;
private boolean tightEncodingEnabled;
private boolean sizePrefixDisabled;
private long maxFrameSize = DEFAULT_MAX_FRAME_SIZE;
// The following fields are used for value caching
private short nextMarshallCacheIndex;
private short nextMarshallCacheEvictionIndex;
private Map marshallCacheMap = new HashMap();
private DataStructure marshallCache[] = null;
private DataStructure unmarshallCache[] = null;
private DataByteArrayOutputStream bytesOut = new DataByteArrayOutputStream();
private DataByteArrayInputStream bytesIn = new DataByteArrayInputStream();
private WireFormatInfo preferedWireFormatInfo;
public OpenWireFormat() {
this(DEFAULT_STORE_VERSION);
}
public OpenWireFormat(int i) {
setVersion(i);
}
@Override
public int hashCode() {
return version ^ (cacheEnabled ? 0x10000000 : 0x20000000)
^ (stackTraceEnabled ? 0x01000000 : 0x02000000)
^ (tightEncodingEnabled ? 0x00100000 : 0x00200000)
^ (sizePrefixDisabled ? 0x00010000 : 0x00020000);
}
public OpenWireFormat copy() {
OpenWireFormat answer = new OpenWireFormat(version);
answer.stackTraceEnabled = stackTraceEnabled;
answer.tcpNoDelayEnabled = tcpNoDelayEnabled;
answer.cacheEnabled = cacheEnabled;
answer.tightEncodingEnabled = tightEncodingEnabled;
answer.sizePrefixDisabled = sizePrefixDisabled;
answer.preferedWireFormatInfo = preferedWireFormatInfo;
return answer;
}
@Override
public boolean equals(Object object) {
if (object == null) {
return false;
}
OpenWireFormat o = (OpenWireFormat)object;
return o.stackTraceEnabled == stackTraceEnabled && o.cacheEnabled == cacheEnabled
&& o.version == version && o.tightEncodingEnabled == tightEncodingEnabled
&& o.sizePrefixDisabled == sizePrefixDisabled;
}
@Override
public String toString() {
return "OpenWireFormat{version=" + version + ", cacheEnabled=" + cacheEnabled + ", stackTraceEnabled=" + stackTraceEnabled + ", tightEncodingEnabled="
+ tightEncodingEnabled + ", sizePrefixDisabled=" + sizePrefixDisabled + ", maxFrameSize=" + maxFrameSize + "}";
// return "OpenWireFormat{id="+id+",
// tightEncodingEnabled="+tightEncodingEnabled+"}";
}
@Override
public int getVersion() {
return version;
}
@Override
public synchronized ByteSequence marshal(Object command) throws IOException {
if (cacheEnabled) {
runMarshallCacheEvictionSweep();
}
ByteSequence sequence = null;
int size = 1;
if (command != null) {
DataStructure c = (DataStructure)command;
byte type = c.getDataStructureType();
DataStreamMarshaller dsm = dataMarshallers[type & 0xFF];
if (dsm == null) {
throw new IOException("Unknown data type: " + type);
}
if (tightEncodingEnabled) {
BooleanStream bs = new BooleanStream();
size += dsm.tightMarshal1(this, c, bs);
size += bs.marshalledSize();
bytesOut.restart(size);
if (!sizePrefixDisabled) {
bytesOut.writeInt(size);
}
bytesOut.writeByte(type);
bs.marshal(bytesOut);
dsm.tightMarshal2(this, c, bytesOut, bs);
sequence = bytesOut.toByteSequence();
} else {
bytesOut.restart();
if (!sizePrefixDisabled) {
bytesOut.writeInt(0); // we don't know the final size
// yet but write this here for
// now.
}
bytesOut.writeByte(type);
dsm.looseMarshal(this, c, bytesOut);
sequence = bytesOut.toByteSequence();
if (!sizePrefixDisabled) {
size = sequence.getLength() - 4;
int pos = sequence.offset;
ByteSequenceData.writeIntBig(sequence, size);
sequence.offset = pos;
}
}
} else {
bytesOut.restart(5);
bytesOut.writeInt(size);
bytesOut.writeByte(NULL_TYPE);
sequence = bytesOut.toByteSequence();
}
return sequence;
}
@Override
public synchronized Object unmarshal(ByteSequence sequence) throws IOException {
bytesIn.restart(sequence);
// DataInputStream dis = new DataInputStream(new
// ByteArrayInputStream(sequence));
if (!sizePrefixDisabled) {
int size = bytesIn.readInt();
if (sequence.getLength() - 4 != size) {
// throw new IOException("Packet size does not match marshaled
// size");
}
if (size > maxFrameSize) {
throw IOExceptionSupport.createFrameSizeException(size, maxFrameSize);
}
}
Object command = doUnmarshal(bytesIn);
// if( !cacheEnabled && ((DataStructure)command).isMarshallAware() ) {
// ((MarshallAware) command).setCachedMarshalledForm(this, sequence);
// }
return command;
}
@Override
public synchronized void marshal(Object o, DataOutput dataOut) throws IOException {
if (cacheEnabled) {
runMarshallCacheEvictionSweep();
}
int size = 1;
if (o != null) {
DataStructure c = (DataStructure)o;
byte type = c.getDataStructureType();
DataStreamMarshaller dsm = dataMarshallers[type & 0xFF];
if (dsm == null) {
throw new IOException("Unknown data type: " + type);
}
if (tightEncodingEnabled) {
BooleanStream bs = new BooleanStream();
size += dsm.tightMarshal1(this, c, bs);
size += bs.marshalledSize();
if (!sizePrefixDisabled) {
dataOut.writeInt(size);
}
dataOut.writeByte(type);
bs.marshal(dataOut);
dsm.tightMarshal2(this, c, dataOut, bs);
} else {
DataOutput looseOut = dataOut;
if (!sizePrefixDisabled) {
bytesOut.restart();
looseOut = bytesOut;
}
looseOut.writeByte(type);
dsm.looseMarshal(this, c, looseOut);
if (!sizePrefixDisabled) {
ByteSequence sequence = bytesOut.toByteSequence();
dataOut.writeInt(sequence.getLength());
dataOut.write(sequence.getData(), sequence.getOffset(), sequence.getLength());
}
}
} else {
if (!sizePrefixDisabled) {
dataOut.writeInt(size);
}
dataOut.writeByte(NULL_TYPE);
}
}
@Override
public Object unmarshal(DataInput dis) throws IOException {
DataInput dataIn = dis;
if (!sizePrefixDisabled) {
int size = dis.readInt();
if (size > maxFrameSize) {
throw IOExceptionSupport.createFrameSizeException(size, maxFrameSize);
}
// int size = dis.readInt();
// byte[] data = new byte[size];
// dis.readFully(data);
// bytesIn.restart(data);
// dataIn = bytesIn;
}
return doUnmarshal(dataIn);
}
/**
* Used by NIO or AIO transports
*/
public int tightMarshal1(Object o, BooleanStream bs) throws IOException {
int size = 1;
if (o != null) {
DataStructure c = (DataStructure)o;
byte type = c.getDataStructureType();
DataStreamMarshaller dsm = dataMarshallers[type & 0xFF];
if (dsm == null) {
throw new IOException("Unknown data type: " + type);
}
size += dsm.tightMarshal1(this, c, bs);
size += bs.marshalledSize();
}
return size;
}
/**
* Used by NIO or AIO transports; note that the size is not written as part
* of this method.
*/
public void tightMarshal2(Object o, DataOutput ds, BooleanStream bs) throws IOException {
if (cacheEnabled) {
runMarshallCacheEvictionSweep();
}
if (o != null) {
DataStructure c = (DataStructure)o;
byte type = c.getDataStructureType();
DataStreamMarshaller dsm = dataMarshallers[type & 0xFF];
if (dsm == null) {
throw new IOException("Unknown data type: " + type);
}
ds.writeByte(type);
bs.marshal(ds);
dsm.tightMarshal2(this, c, ds, bs);
}
}
/**
* Allows you to dynamically switch the version of the openwire protocol
* being used.
*
* @param version
*/
@Override
public void setVersion(int version) {
String mfName = "org.apache.activemq.openwire.v" + version + ".MarshallerFactory";
Class mfClass;
try {
mfClass = Class.forName(mfName, false, getClass().getClassLoader());
} catch (ClassNotFoundException e) {
throw (IllegalArgumentException)new IllegalArgumentException("Invalid version: " + version
+ ", could not load " + mfName)
.initCause(e);
}
try {
Method method = mfClass.getMethod("createMarshallerMap", new Class[] {OpenWireFormat.class});
dataMarshallers = (DataStreamMarshaller[])method.invoke(null, new Object[] {this});
} catch (Throwable e) {
throw (IllegalArgumentException)new IllegalArgumentException(
"Invalid version: "
+ version
+ ", "
+ mfName
+ " does not properly implement the createMarshallerMap method.")
.initCause(e);
}
this.version = version;
}
public Object doUnmarshal(DataInput dis) throws IOException {
byte dataType = dis.readByte();
if (dataType != NULL_TYPE) {
DataStreamMarshaller dsm = dataMarshallers[dataType & 0xFF];
if (dsm == null) {
throw new IOException("Unknown data type: " + dataType);
}
Object data = dsm.createObject();
if (this.tightEncodingEnabled) {
BooleanStream bs = new BooleanStream();
bs.unmarshal(dis);
dsm.tightUnmarshal(this, data, dis, bs);
} else {
dsm.looseUnmarshal(this, data, dis);
}
return data;
} else {
return null;
}
}
// public void debug(String msg) {
// String t = (Thread.currentThread().getName()+" ").substring(0, 40);
// System.out.println(t+": "+msg);
// }
public int tightMarshalNestedObject1(DataStructure o, BooleanStream bs) throws IOException {
bs.writeBoolean(o != null);
if (o == null) {
return 0;
}
if (o.isMarshallAware()) {
// MarshallAware ma = (MarshallAware)o;
ByteSequence sequence = null;
// sequence=ma.getCachedMarshalledForm(this);
bs.writeBoolean(sequence != null);
if (sequence != null) {
return 1 + sequence.getLength();
}
}
byte type = o.getDataStructureType();
DataStreamMarshaller dsm = dataMarshallers[type & 0xFF];
if (dsm == null) {
throw new IOException("Unknown data type: " + type);
}
return 1 + dsm.tightMarshal1(this, o, bs);
}
public void tightMarshalNestedObject2(DataStructure o, DataOutput ds, BooleanStream bs)
throws IOException {
if (!bs.readBoolean()) {
return;
}
byte type = o.getDataStructureType();
ds.writeByte(type);
if (o.isMarshallAware() && bs.readBoolean()) {
// We should not be doing any caching
throw new IOException("Corrupted stream");
// MarshallAware ma = (MarshallAware) o;
// ByteSequence sequence=ma.getCachedMarshalledForm(this);
// ds.write(sequence.getData(), sequence.getOffset(),
// sequence.getLength());
} else {
DataStreamMarshaller dsm = dataMarshallers[type & 0xFF];
if (dsm == null) {
throw new IOException("Unknown data type: " + type);
}
dsm.tightMarshal2(this, o, ds, bs);
}
}
public DataStructure tightUnmarshalNestedObject(DataInput dis, BooleanStream bs) throws IOException {
if (bs.readBoolean()) {
byte dataType = dis.readByte();
DataStreamMarshaller dsm = dataMarshallers[dataType & 0xFF];
if (dsm == null) {
throw new IOException("Unknown data type: " + dataType);
}
DataStructure data = dsm.createObject();
if (data.isMarshallAware() && bs.readBoolean()) {
dis.readInt();
dis.readByte();
BooleanStream bs2 = new BooleanStream();
bs2.unmarshal(dis);
dsm.tightUnmarshal(this, data, dis, bs2);
// TODO: extract the sequence from the dis and associate it.
// MarshallAware ma = (MarshallAware)data
// ma.setCachedMarshalledForm(this, sequence);
} else {
dsm.tightUnmarshal(this, data, dis, bs);
}
return data;
} else {
return null;
}
}
public DataStructure looseUnmarshalNestedObject(DataInput dis) throws IOException {
if (dis.readBoolean()) {
byte dataType = dis.readByte();
DataStreamMarshaller dsm = dataMarshallers[dataType & 0xFF];
if (dsm == null) {
throw new IOException("Unknown data type: " + dataType);
}
DataStructure data = dsm.createObject();
dsm.looseUnmarshal(this, data, dis);
return data;
} else {
return null;
}
}
public void looseMarshalNestedObject(DataStructure o, DataOutput dataOut) throws IOException {
dataOut.writeBoolean(o != null);
if (o != null) {
byte type = o.getDataStructureType();
dataOut.writeByte(type);
DataStreamMarshaller dsm = dataMarshallers[type & 0xFF];
if (dsm == null) {
throw new IOException("Unknown data type: " + type);
}
dsm.looseMarshal(this, o, dataOut);
}
}
public void runMarshallCacheEvictionSweep() {
// Do we need to start evicting??
while (marshallCacheMap.size() > marshallCache.length - MARSHAL_CACHE_FREE_SPACE) {
marshallCacheMap.remove(marshallCache[nextMarshallCacheEvictionIndex]);
marshallCache[nextMarshallCacheEvictionIndex] = null;
nextMarshallCacheEvictionIndex++;
if (nextMarshallCacheEvictionIndex >= marshallCache.length) {
nextMarshallCacheEvictionIndex = 0;
}
}
}
public Short getMarshallCacheIndex(DataStructure o) {
return marshallCacheMap.get(o);
}
public Short addToMarshallCache(DataStructure o) {
short i = nextMarshallCacheIndex++;
if (nextMarshallCacheIndex >= marshallCache.length) {
nextMarshallCacheIndex = 0;
}
// We can only cache that item if there is space left.
if (marshallCacheMap.size() < marshallCache.length) {
marshallCache[i] = o;
Short index = new Short(i);
marshallCacheMap.put(o, index);
return index;
} else {
// Use -1 to indicate that the value was not cached due to cache
// being full.
return new Short((short)-1);
}
}
public void setInUnmarshallCache(short index, DataStructure o) {
// There was no space left in the cache, so we can't
// put this in the cache.
if (index == -1) {
return;
}
unmarshallCache[index] = o;
}
public DataStructure getFromUnmarshallCache(short index) {
return unmarshallCache[index];
}
public void setStackTraceEnabled(boolean b) {
stackTraceEnabled = b;
}
public boolean isStackTraceEnabled() {
return stackTraceEnabled;
}
public boolean isTcpNoDelayEnabled() {
return tcpNoDelayEnabled;
}
public void setTcpNoDelayEnabled(boolean tcpNoDelayEnabled) {
this.tcpNoDelayEnabled = tcpNoDelayEnabled;
}
public boolean isCacheEnabled() {
return cacheEnabled;
}
public void setCacheEnabled(boolean cacheEnabled) {
if(cacheEnabled){
marshallCache = new DataStructure[MARSHAL_CACHE_SIZE];
unmarshallCache = new DataStructure[MARSHAL_CACHE_SIZE];
}
this.cacheEnabled = cacheEnabled;
}
public boolean isTightEncodingEnabled() {
return tightEncodingEnabled;
}
public void setTightEncodingEnabled(boolean tightEncodingEnabled) {
this.tightEncodingEnabled = tightEncodingEnabled;
}
public boolean isSizePrefixDisabled() {
return sizePrefixDisabled;
}
public void setSizePrefixDisabled(boolean prefixPacketSize) {
this.sizePrefixDisabled = prefixPacketSize;
}
public void setPreferedWireFormatInfo(WireFormatInfo info) {
this.preferedWireFormatInfo = info;
}
public WireFormatInfo getPreferedWireFormatInfo() {
return preferedWireFormatInfo;
}
public long getMaxFrameSize() {
return maxFrameSize;
}
public void setMaxFrameSize(long maxFrameSize) {
this.maxFrameSize = maxFrameSize;
}
public void renegotiateWireFormat(WireFormatInfo info) throws IOException {
if (preferedWireFormatInfo == null) {
throw new IllegalStateException("Wireformat cannot not be renegotiated.");
}
this.setVersion(min(preferedWireFormatInfo.getVersion(), info.getVersion()));
info.setVersion(this.getVersion());
this.setMaxFrameSize(min(preferedWireFormatInfo.getMaxFrameSize(), info.getMaxFrameSize()));
info.setMaxFrameSize(this.getMaxFrameSize());
this.stackTraceEnabled = info.isStackTraceEnabled() && preferedWireFormatInfo.isStackTraceEnabled();
info.setStackTraceEnabled(this.stackTraceEnabled);
this.tcpNoDelayEnabled = info.isTcpNoDelayEnabled() && preferedWireFormatInfo.isTcpNoDelayEnabled();
info.setTcpNoDelayEnabled(this.tcpNoDelayEnabled);
this.cacheEnabled = info.isCacheEnabled() && preferedWireFormatInfo.isCacheEnabled();
info.setCacheEnabled(this.cacheEnabled);
this.tightEncodingEnabled = info.isTightEncodingEnabled()
&& preferedWireFormatInfo.isTightEncodingEnabled();
info.setTightEncodingEnabled(this.tightEncodingEnabled);
this.sizePrefixDisabled = info.isSizePrefixDisabled()
&& preferedWireFormatInfo.isSizePrefixDisabled();
info.setSizePrefixDisabled(this.sizePrefixDisabled);
if (cacheEnabled) {
int size = Math.min(preferedWireFormatInfo.getCacheSize(), info.getCacheSize());
info.setCacheSize(size);
if (size == 0) {
size = MARSHAL_CACHE_SIZE;
}
marshallCache = new DataStructure[size];
unmarshallCache = new DataStructure[size];
nextMarshallCacheIndex = 0;
nextMarshallCacheEvictionIndex = 0;
marshallCacheMap = new HashMap();
} else {
marshallCache = null;
unmarshallCache = null;
nextMarshallCacheIndex = 0;
nextMarshallCacheEvictionIndex = 0;
marshallCacheMap = null;
}
}
protected int min(int version1, int version2) {
if (version1 < version2 && version1 > 0 || version2 <= 0) {
return version1;
}
return version2;
}
protected long min(long version1, long version2) {
if (version1 < version2 && version1 > 0 || version2 <= 0) {
return version1;
}
return version2;
}
}
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