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The ActiveMQ Client implementation
/**
* 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.command;
import java.beans.Transient;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.ObjectStreamException;
import java.io.OutputStream;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.zip.DeflaterOutputStream;
import jakarta.jms.JMSException;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.advisory.AdvisorySupport;
import org.apache.activemq.broker.region.MessageReference;
import org.apache.activemq.usage.MemoryUsage;
import org.apache.activemq.util.ByteArrayInputStream;
import org.apache.activemq.util.ByteArrayOutputStream;
import org.apache.activemq.util.ByteSequence;
import org.apache.activemq.util.MarshallingSupport;
import org.apache.activemq.wireformat.WireFormat;
import org.fusesource.hawtbuf.UTF8Buffer;
/**
* Represents an ActiveMQ message
*
* @openwire:marshaller
*
*/
public abstract class Message extends BaseCommand implements MarshallAware, MessageReference {
public static final String ORIGINAL_EXPIRATION = "originalExpiration";
/**
* The default minimum amount of memory a message is assumed to use
*/
public static final int DEFAULT_MINIMUM_MESSAGE_SIZE = 1024;
protected MessageId messageId;
protected ActiveMQDestination originalDestination;
protected TransactionId originalTransactionId;
protected ProducerId producerId;
protected ActiveMQDestination destination;
protected TransactionId transactionId;
protected long deliveryTime;
protected long expiration;
protected long timestamp;
protected long arrival;
protected long brokerInTime;
protected long brokerOutTime;
protected String correlationId;
protected ActiveMQDestination replyTo;
protected boolean persistent;
protected String type;
protected byte priority;
protected String groupID;
protected int groupSequence;
protected ConsumerId targetConsumerId;
protected boolean compressed;
protected String userID;
protected ByteSequence content;
protected volatile ByteSequence marshalledProperties;
protected DataStructure dataStructure;
protected int redeliveryCounter;
protected int size;
protected Map properties;
protected boolean readOnlyProperties;
protected boolean readOnlyBody;
protected transient boolean recievedByDFBridge;
protected boolean droppable;
protected boolean jmsXGroupFirstForConsumer;
private transient short referenceCount;
private transient ActiveMQConnection connection;
transient MessageDestination regionDestination;
transient MemoryUsage memoryUsage;
transient AtomicBoolean processAsExpired = new AtomicBoolean(false);
private BrokerId[] brokerPath;
private BrokerId[] cluster;
public static interface MessageDestination {
int getMinimumMessageSize();
MemoryUsage getMemoryUsage();
}
public abstract Message copy();
public abstract void clearBody() throws JMSException;
public abstract void storeContent();
public abstract void storeContentAndClear();
// useful to reduce the memory footprint of a persisted message
public void clearUnMarshalledState() throws JMSException {
properties = null;
}
public boolean isMarshalled() {
return isContentMarshalled() && isPropertiesMarshalled();
}
protected boolean isPropertiesMarshalled() {
return marshalledProperties != null || properties == null;
}
protected boolean isContentMarshalled() {
return content != null;
}
protected void copy(Message copy) {
super.copy(copy);
copy.producerId = producerId;
copy.transactionId = transactionId;
copy.destination = destination;
copy.messageId = messageId != null ? messageId.copy() : null;
copy.originalDestination = originalDestination;
copy.originalTransactionId = originalTransactionId;
copy.deliveryTime = deliveryTime;
copy.expiration = expiration;
copy.timestamp = timestamp;
copy.correlationId = correlationId;
copy.replyTo = replyTo;
copy.persistent = persistent;
copy.redeliveryCounter = redeliveryCounter;
copy.type = type;
copy.priority = priority;
copy.size = size;
copy.groupID = groupID;
copy.userID = userID;
copy.groupSequence = groupSequence;
if (properties != null) {
copy.properties = new HashMap(properties);
// The new message hasn't expired, so remove this feild.
copy.properties.remove(ORIGINAL_EXPIRATION);
} else {
copy.properties = properties;
}
copy.content = copyByteSequence(content);
copy.marshalledProperties = copyByteSequence(marshalledProperties);
copy.dataStructure = dataStructure;
copy.readOnlyProperties = readOnlyProperties;
copy.readOnlyBody = readOnlyBody;
copy.compressed = compressed;
copy.recievedByDFBridge = recievedByDFBridge;
copy.arrival = arrival;
copy.connection = connection;
copy.regionDestination = regionDestination;
copy.brokerInTime = brokerInTime;
copy.brokerOutTime = brokerOutTime;
copy.memoryUsage=this.memoryUsage;
copy.brokerPath = brokerPath;
copy.jmsXGroupFirstForConsumer = jmsXGroupFirstForConsumer;
// lets not copy the following fields
// copy.targetConsumerId = targetConsumerId;
// copy.referenceCount = referenceCount;
}
private ByteSequence copyByteSequence(ByteSequence content) {
if (content != null) {
return new ByteSequence(content.getData(), content.getOffset(), content.getLength());
}
return null;
}
public Object getProperty(String name) throws IOException {
if (properties == null) {
if (marshalledProperties == null) {
return null;
}
properties = unmarsallProperties(marshalledProperties);
}
Object result = properties.get(name);
if (result instanceof UTF8Buffer) {
result = result.toString();
}
return result;
}
@SuppressWarnings("unchecked")
public Map getProperties() throws IOException {
if (properties == null) {
if (marshalledProperties == null) {
return Collections.EMPTY_MAP;
}
properties = unmarsallProperties(marshalledProperties);
}
return Collections.unmodifiableMap(properties);
}
public void clearProperties() {
marshalledProperties = null;
properties = null;
}
public void setProperty(String name, Object value) throws IOException {
lazyCreateProperties();
properties.put(name, value);
}
public void removeProperty(String name) throws IOException {
lazyCreateProperties();
properties.remove(name);
}
protected void lazyCreateProperties() throws IOException {
if (properties == null) {
if (marshalledProperties == null) {
properties = new HashMap();
} else {
properties = unmarsallProperties(marshalledProperties);
marshalledProperties = null;
}
} else {
marshalledProperties = null;
}
}
private Map unmarsallProperties(ByteSequence marshalledProperties) throws IOException {
return MarshallingSupport.unmarshalPrimitiveMap(new DataInputStream(new ByteArrayInputStream(marshalledProperties)));
}
@Override
public void beforeMarshall(WireFormat wireFormat) throws IOException {
// Need to marshal the properties.
if (marshalledProperties == null && properties != null) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream os = new DataOutputStream(baos);
MarshallingSupport.marshalPrimitiveMap(properties, os);
os.close();
marshalledProperties = baos.toByteSequence();
}
}
@Override
public void afterMarshall(WireFormat wireFormat) throws IOException {
}
@Override
public void beforeUnmarshall(WireFormat wireFormat) throws IOException {
}
@Override
public void afterUnmarshall(WireFormat wireFormat) throws IOException {
}
// /////////////////////////////////////////////////////////////////
//
// Simple Field accessors
//
// /////////////////////////////////////////////////////////////////
/**
* @openwire:property version=1 cache=true
*/
public ProducerId getProducerId() {
return producerId;
}
public void setProducerId(ProducerId producerId) {
this.producerId = producerId;
}
/**
* @openwire:property version=1 cache=true
*/
public ActiveMQDestination getDestination() {
return destination;
}
public void setDestination(ActiveMQDestination destination) {
this.destination = destination;
}
/**
* @openwire:property version=1 cache=true
*/
public TransactionId getTransactionId() {
return transactionId;
}
public void setTransactionId(TransactionId transactionId) {
this.transactionId = transactionId;
}
public boolean isInTransaction() {
return transactionId != null;
}
/**
* @openwire:property version=1 cache=true
*/
public ActiveMQDestination getOriginalDestination() {
return originalDestination;
}
public void setOriginalDestination(ActiveMQDestination destination) {
this.originalDestination = destination;
}
/**
* @openwire:property version=1
*/
@Override
public MessageId getMessageId() {
return messageId;
}
public void setMessageId(MessageId messageId) {
this.messageId = messageId;
}
/**
* @openwire:property version=1 cache=true
*/
public TransactionId getOriginalTransactionId() {
return originalTransactionId;
}
public void setOriginalTransactionId(TransactionId transactionId) {
this.originalTransactionId = transactionId;
}
/**
* @openwire:property version=1
*/
@Override
public String getGroupID() {
return groupID;
}
public void setGroupID(String groupID) {
this.groupID = groupID;
}
/**
* @openwire:property version=1
*/
@Override
public int getGroupSequence() {
return groupSequence;
}
public void setGroupSequence(int groupSequence) {
this.groupSequence = groupSequence;
}
/**
* @openwire:property version=1
*/
public String getCorrelationId() {
return correlationId;
}
public void setCorrelationId(String correlationId) {
this.correlationId = correlationId;
}
/**
* @openwire:property version=1
*/
@Override
public boolean isPersistent() {
return persistent;
}
public void setPersistent(boolean deliveryMode) {
this.persistent = deliveryMode;
}
/**
* @openwire:property version=1
*/
@Override
public long getExpiration() {
return expiration;
}
public void setExpiration(long expiration) {
this.expiration = expiration;
}
/**
* @openwire:property version=1
*/
public byte getPriority() {
return priority;
}
public void setPriority(byte priority) {
if (priority < 0) {
this.priority = 0;
} else if (priority > 9) {
this.priority = 9;
} else {
this.priority = priority;
}
}
/**
* @openwire:property version=1
*/
public ActiveMQDestination getReplyTo() {
return replyTo;
}
public void setReplyTo(ActiveMQDestination replyTo) {
this.replyTo = replyTo;
}
/**
* @openwire:property version=1
*/
public long getTimestamp() {
return timestamp;
}
public void setTimestamp(long timestamp) {
this.timestamp = timestamp;
}
/**
* @openwire:property version=1
*/
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
/**
* @openwire:property version=1
*/
public ByteSequence getContent() {
return content;
}
public void setContent(ByteSequence content) {
this.content = content;
}
/**
* @openwire:property version=1
*/
public ByteSequence getMarshalledProperties() {
return marshalledProperties;
}
public void setMarshalledProperties(ByteSequence marshalledProperties) {
this.marshalledProperties = marshalledProperties;
}
/**
* @openwire:property version=1
*/
public DataStructure getDataStructure() {
return dataStructure;
}
public void setDataStructure(DataStructure data) {
this.dataStructure = data;
}
/**
* Can be used to route the message to a specific consumer. Should be null
* to allow the broker use normal JMS routing semantics. If the target
* consumer id is an active consumer on the broker, the message is dropped.
* Used by the AdvisoryBroker to replay advisory messages to a specific
* consumer.
*
* @openwire:property version=1 cache=true
*/
@Override
public ConsumerId getTargetConsumerId() {
return targetConsumerId;
}
public void setTargetConsumerId(ConsumerId targetConsumerId) {
this.targetConsumerId = targetConsumerId;
}
@Override
public boolean isExpired() {
long expireTime = getExpiration();
return expireTime > 0 && System.currentTimeMillis() > expireTime;
}
@Override
public boolean isAdvisory() {
return type != null && type.equals(AdvisorySupport.ADIVSORY_MESSAGE_TYPE);
}
/**
* @openwire:property version=1
*/
public boolean isCompressed() {
return compressed;
}
public void setCompressed(boolean compressed) {
this.compressed = compressed;
}
public boolean isRedelivered() {
return redeliveryCounter > 0;
}
public void setRedelivered(boolean redelivered) {
if (redelivered) {
if (!isRedelivered()) {
setRedeliveryCounter(1);
}
} else {
if (isRedelivered()) {
setRedeliveryCounter(0);
}
}
}
@Override
public void incrementRedeliveryCounter() {
redeliveryCounter++;
}
/**
* @openwire:property version=1
*/
@Override
public int getRedeliveryCounter() {
return redeliveryCounter;
}
public void setRedeliveryCounter(int deliveryCounter) {
this.redeliveryCounter = deliveryCounter;
}
/**
* The route of brokers the command has moved through.
*
* @openwire:property version=1 cache=true
*/
public BrokerId[] getBrokerPath() {
return brokerPath;
}
public void setBrokerPath(BrokerId[] brokerPath) {
this.brokerPath = brokerPath;
}
public boolean isReadOnlyProperties() {
return readOnlyProperties;
}
public void setReadOnlyProperties(boolean readOnlyProperties) {
this.readOnlyProperties = readOnlyProperties;
}
public boolean isReadOnlyBody() {
return readOnlyBody;
}
public void setReadOnlyBody(boolean readOnlyBody) {
this.readOnlyBody = readOnlyBody;
}
public ActiveMQConnection getConnection() {
return this.connection;
}
public void setConnection(ActiveMQConnection connection) {
this.connection = connection;
}
/**
* Used to schedule the arrival time of a message to a broker. The broker
* will not dispatch a message to a consumer until it's arrival time has
* elapsed.
*
* @openwire:property version=1
*/
public long getArrival() {
return arrival;
}
public void setArrival(long arrival) {
this.arrival = arrival;
}
/**
* Only set by the broker and defines the userID of the producer connection
* who sent this message. This is an optional field, it needs to be enabled
* on the broker to have this field populated.
*
* @openwire:property version=1
*/
public String getUserID() {
return userID;
}
public void setUserID(String jmsxUserID) {
this.userID = jmsxUserID;
}
@Override
public int getReferenceCount() {
return referenceCount;
}
@Override
public Message getMessageHardRef() {
return this;
}
@Override
public Message getMessage() {
return this;
}
public void setRegionDestination(MessageDestination destination) {
this.regionDestination = destination;
if(this.memoryUsage==null) {
this.memoryUsage=destination.getMemoryUsage();
}
}
@Override
@Transient
public MessageDestination getRegionDestination() {
return regionDestination;
}
public MemoryUsage getMemoryUsage() {
return this.memoryUsage;
}
public void setMemoryUsage(MemoryUsage usage) {
this.memoryUsage=usage;
}
@Override
public boolean isMarshallAware() {
return true;
}
@Override
public int incrementReferenceCount() {
int rc;
int size;
synchronized (this) {
rc = ++referenceCount;
size = getSize();
}
if (rc == 1 && getMemoryUsage() != null) {
getMemoryUsage().increaseUsage(size);
//System.err.println("INCREASE USAGE " + System.identityHashCode(getMemoryUsage()) + " PERCENT = " + getMemoryUsage().getPercentUsage());
}
//System.out.println(" + "+getMemoryUsage().getName()+" :::: "+getMessageId()+"rc="+rc);
return rc;
}
@Override
public int decrementReferenceCount() {
int rc;
int size;
synchronized (this) {
rc = --referenceCount;
size = getSize();
}
if (rc == 0 && getMemoryUsage() != null) {
getMemoryUsage().decreaseUsage(size);
//Thread.dumpStack();
//System.err.println("DECREADED USAGE " + System.identityHashCode(getMemoryUsage()) + " PERCENT = " + getMemoryUsage().getPercentUsage());
}
//System.out.println(" - "+getMemoryUsage().getName()+" :::: "+getMessageId()+"rc="+rc);
return rc;
}
@Override
public int getSize() {
int minimumMessageSize = getMinimumMessageSize();
if (size < minimumMessageSize || size == 0) {
size = minimumMessageSize;
if (marshalledProperties != null) {
size += marshalledProperties.getLength();
}
if (content != null) {
size += content.getLength();
}
}
return size;
}
protected int getMinimumMessageSize() {
int result = DEFAULT_MINIMUM_MESSAGE_SIZE;
//let destination override
MessageDestination dest = regionDestination;
if (dest != null) {
result=dest.getMinimumMessageSize();
}
return result;
}
/**
* @openwire:property version=1
* @return Returns the recievedByDFBridge.
*/
public boolean isRecievedByDFBridge() {
return recievedByDFBridge;
}
/**
* @param recievedByDFBridge The recievedByDFBridge to set.
*/
public void setRecievedByDFBridge(boolean recievedByDFBridge) {
this.recievedByDFBridge = recievedByDFBridge;
}
public void onMessageRolledBack() {
incrementRedeliveryCounter();
}
/**
* @openwire:property version=2 cache=true
*/
public boolean isDroppable() {
return droppable;
}
public void setDroppable(boolean droppable) {
this.droppable = droppable;
}
/**
* If a message is stored in multiple nodes on a cluster, all the cluster
* members will be listed here. Otherwise, it will be null.
*
* @openwire:property version=3 cache=true
*/
public BrokerId[] getCluster() {
return cluster;
}
public void setCluster(BrokerId[] cluster) {
this.cluster = cluster;
}
@Override
public boolean isMessage() {
return true;
}
/**
* @openwire:property version=3
*/
public long getBrokerInTime() {
return this.brokerInTime;
}
public void setBrokerInTime(long brokerInTime) {
this.brokerInTime = brokerInTime;
}
/**
* @openwire:property version=3
*/
public long getBrokerOutTime() {
return this.brokerOutTime;
}
public void setBrokerOutTime(long brokerOutTime) {
this.brokerOutTime = brokerOutTime;
}
@Override
public boolean isDropped() {
return false;
}
/**
* @openwire:property version=10
*/
public boolean isJMSXGroupFirstForConsumer() {
return jmsXGroupFirstForConsumer;
}
public void setJMSXGroupFirstForConsumer(boolean val) {
jmsXGroupFirstForConsumer = val;
}
public void compress() throws IOException {
if (!isCompressed()) {
storeContent();
if (!isCompressed() && getContent() != null) {
doCompress();
}
}
}
protected void doCompress() throws IOException {
compressed = true;
ByteSequence bytes = getContent();
ByteArrayOutputStream bytesOut = new ByteArrayOutputStream();
OutputStream os = new DeflaterOutputStream(bytesOut);
os.write(bytes.data, bytes.offset, bytes.length);
os.close();
setContent(bytesOut.toByteSequence());
}
@Override
public String toString() {
return toString(null);
}
@Override
public String toString(MapoverrideFields) {
try {
getProperties();
} catch (IOException e) {
}
return super.toString(overrideFields);
}
@Override
public boolean canProcessAsExpired() {
return processAsExpired.compareAndSet(false, true);
}
/**
* Initialize the transient fields at deserialization to get a normal state.
*
* @see Serializable Javadoc
*/
protected Object readResolve() throws ObjectStreamException {
if (this.processAsExpired == null) {
this.processAsExpired = new AtomicBoolean();
}
return this;
}
}