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Apache CXF Runtime WS Reliable Messaging
/**
* 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.cxf.ws.rm;
import java.math.BigInteger;
import java.util.Date;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.datatype.Duration;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.jaxb.DatatypeFactory;
import org.apache.cxf.ws.addressing.ContextUtils;
import org.apache.cxf.ws.rm.SequenceAcknowledgement.AcknowledgementRange;
import org.apache.cxf.ws.rm.manager.SequenceTerminationPolicyType;
public class SourceSequence extends AbstractSequence {
private static final Logger LOG = LogUtils.getL7dLogger(SourceSequence.class);
private Date expires;
private Source source;
private BigInteger currentMessageNumber;
private boolean lastMessage;
private Identifier offeringId;
private org.apache.cxf.ws.addressing.EndpointReferenceType target;
public SourceSequence(Identifier i) {
this(i, null, null);
}
public SourceSequence(Identifier i, Date e, Identifier oi) {
this(i, e, oi, BigInteger.ZERO, false);
}
public SourceSequence(Identifier i, Date e, Identifier oi, BigInteger cmn, boolean lm) {
super(i);
expires = e;
offeringId = oi;
currentMessageNumber = cmn;
lastMessage = lm;
acknowledgement = RMUtils.getWSRMFactory().createSequenceAcknowledgement();
acknowledgement.setIdentifier(id);
}
/**
* @return the message number assigned to the most recent outgoing
* application message.
*/
public BigInteger getCurrentMessageNr() {
return currentMessageNumber;
}
/**
* @return true if the last message had been sent for this sequence.
*/
public boolean isLastMessage() {
return lastMessage;
}
/**
* @return the identifier of the sequence that was created on behalf of the
* CreateSequence request that included this sequence as an offer
*/
public Identifier getOfferingSequenceIdentifier() {
return offeringId;
}
/**
* @return the identifier of the rm source
*/
public String getEndpointIdentifier() {
return source.getName().toString();
}
/**
* @return the expiry data of this sequence
*/
public Date getExpires() {
return expires;
}
/**
* Returns true if this sequence was constructed from an offer for an
* inbound sequence includes in the CreateSequenceRequest in response to
* which the sequence with the specified identifier was created.
*
* @param id the sequence identifier
* @return true if the sequence was constructed from an offer.
*/
public boolean offeredBy(Identifier sid) {
return null != offeringId && offeringId.getValue().equals(sid.getValue());
}
/**
* Returns true if a last message had been sent for this sequence and if all
* messages for this sequence have been acknowledged.
*
* @return true if all messages have been acknowledged.
*/
public boolean allAcknowledged() {
if (!lastMessage) {
return false;
}
if (acknowledgement.getAcknowledgementRange().size() == 1) {
AcknowledgementRange r = acknowledgement.getAcknowledgementRange().get(0);
return r.getLower().equals(BigInteger.ONE) && r.getUpper().equals(currentMessageNumber);
}
return false;
}
/**
* Used by the RM source to cache received acknowledgements for this
* sequence.
*
* @param acknowledgement an acknowledgement for this sequence
*/
public void setAcknowledged(SequenceAcknowledgement a) throws RMException {
acknowledgement = a;
source.getManager().getRetransmissionQueue().purgeAcknowledged(this);
if (allAcknowledged()) {
RMEndpoint rme = source.getReliableEndpoint();
Proxy proxy = rme.getProxy();
proxy.terminate(this);
source.removeSequence(this);
}
}
/**
* Returns the source associated with this source sequence.
*
* @return the source.
*/
public Source getSource() {
return source;
}
void setSource(Source s) {
source = s;
}
void setLastMessage(boolean lm) {
lastMessage = lm;
}
/**
* Returns true if the sequence is expired.
*
* @return true if the sequence is expired.
*/
boolean isExpired() {
return expires == null ? false : new Date().after(expires);
}
public void setExpires(Expires ex) {
Duration d = null;
expires = null;
if (null != ex) {
d = ex.getValue();
}
if (null != d && !d.equals(DatatypeFactory.PT0S)) {
Date now = new Date();
expires = new Date(now.getTime() + ex.getValue().getTimeInMillis(now));
}
}
/**
* Returns the next message number and increases the message number.
*
* @return the next message number.
*/
BigInteger nextMessageNumber() {
return nextMessageNumber(null, null, false);
}
/**
* Returns the next message number and increases the message number. The
* parameters, if not null, indicate that this message is being sent as a
* response to the message with the specified message number in the sequence
* specified by the by the identifier, and are used to decide if this
* message should be the last in this sequence.
*
* @return the next message number.
*/
public BigInteger nextMessageNumber(Identifier inSeqId, BigInteger inMsgNumber, boolean last) {
assert !lastMessage;
BigInteger result = null;
synchronized (this) {
currentMessageNumber = currentMessageNumber.add(BigInteger.ONE);
if (last) {
lastMessage = true;
} else {
checkLastMessage(inSeqId, inMsgNumber);
}
result = currentMessageNumber;
}
return result;
}
SequenceAcknowledgement getAcknowledgement() {
return acknowledgement;
}
/**
* The target for the sequence is the first non-anonymous address that a
* message is sent to as part of this sequence. It is subsequently used for
* as the target of out-of-band protocol messages related to that sequence
* that originate from the sequnce source (i.e. TerminateSequence and
* LastMessage, but not AckRequested or SequenceAcknowledgement as these are
* orignate from the sequence destination).
*
* @param to
*/
synchronized void setTarget(org.apache.cxf.ws.addressing.EndpointReferenceType to) {
if (target == null && !ContextUtils.isGenericAddress(to)) {
target = to;
}
}
synchronized org.apache.cxf.ws.addressing.EndpointReferenceType getTarget() {
return target;
}
/**
* Checks if the current message should be the last message in this sequence
* and if so sets the lastMessageNumber property.
*/
private void checkLastMessage(Identifier inSeqId, BigInteger inMsgNumber) {
// check if this is a response to a message that was is the last message
// in the sequence
// that included this sequence as an offer
if (null != inSeqId && null != inMsgNumber) {
Destination destination = source.getReliableEndpoint().getDestination();
DestinationSequence inSeq = null;
if (null != destination) {
inSeq = destination.getSequence(inSeqId);
}
if (null != inSeq && offeredBy(inSeqId) && inMsgNumber.equals(inSeq.getLastMessageNumber())) {
lastMessage = true;
}
}
if (!lastMessage) {
SequenceTerminationPolicyType stp = source.getManager().getSourcePolicy()
.getSequenceTerminationPolicy();
assert null != stp;
if ((!stp.getMaxLength().equals(BigInteger.ZERO) && stp.getMaxLength()
.compareTo(currentMessageNumber) <= 0)
|| (stp.getMaxRanges() > 0 && acknowledgement.getAcknowledgementRange().size() >= stp
.getMaxRanges())
|| (stp.getMaxUnacknowledged() > 0 && source.getManager().getRetransmissionQueue()
.countUnacknowledged(this) >= stp.getMaxUnacknowledged())) {
lastMessage = true;
}
}
if (LOG.isLoggable(Level.FINE) && lastMessage) {
LOG.fine(currentMessageNumber + " should be the last message in this sequence.");
}
}
}