/*
* 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.ode.bpel.memdao;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.ode.bpel.common.CorrelationKey;
import org.apache.ode.bpel.dao.CorrelatorDAO;
import org.apache.ode.bpel.dao.MessageExchangeDAO;
import org.apache.ode.bpel.dao.MessageRouteDAO;
import org.apache.ode.bpel.dao.ProcessInstanceDAO;
import org.apache.ode.utils.CollectionUtils;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
/**
* A very simple, in-memory implementation of the {@link CorrelatorDAO} interface.
*/
class CorrelatorDaoImpl extends DaoBaseImpl implements CorrelatorDAO {
private static final Log __log = LogFactory.getLog(CorrelatorDaoImpl.class);
private String _correlatorId;
private List<MsgQueueEntry> _messages;
private List<MessageRouteDaoImpl> _routes;
private BpelDAOConnectionImpl _conn;
CorrelatorDaoImpl(String correlatorId, BpelDAOConnectionImpl conn) {
_messages = new ArrayList<MsgQueueEntry>();
_routes = new ArrayList<MessageRouteDaoImpl>();
_correlatorId = correlatorId;
_conn = conn;
}
public MessageExchangeDAO dequeueMessage(CorrelationKey key) {
if (__log.isDebugEnabled()) {
__log.debug("dequeueEarliest: MATCHING correlationKey=" + key);
}
for (Iterator i = _messages.iterator(); i.hasNext();) {
MsgQueueEntry mqe = (MsgQueueEntry)i.next();
Set<CorrelationKey> keyset = (Set<CorrelationKey>) CollectionUtils.makeCollection(HashSet.class, mqe.keys);
if ((key == null) || keyset.contains(key)) {
i.remove();
return mqe.message;
}
}
if (__log.isDebugEnabled()) {
__log.debug("dequeueEarliest: MATCH NOT FOUND!");
}
return null;
}
public MessageRouteDAO findRoute(CorrelationKey key) {
if (__log.isDebugEnabled()) {
__log.debug("findRoute: key=" + key);
}
for (MessageRouteDaoImpl we : _routes) {
if ((we._ckey == null && key == null) || (we._ckey != null && key != null && we._ckey.equals(key))) {
return we;
}
}
return null;
}
public String getCorrelatorId() {
return _correlatorId;
}
public void removeRoutes(String routeGroupId, ProcessInstanceDAO target) {
((ProcessInstanceDaoImpl)target).removeRoutes(routeGroupId);
}
public void enqueueMessage(MessageExchangeDAO mex, CorrelationKey[] keys) {
if (__log.isDebugEnabled()) {
__log.debug("enqueueProcessInvocation: data=" + mex + " keys="
+ CollectionUtils.makeCollection(ArrayList.class, keys));
}
MsgQueueEntry mqe = new MsgQueueEntry(mex, keys);
_messages.add(mqe);
}
public void addRoute(String routeId,ProcessInstanceDAO target, int idx, CorrelationKey key) {
if (__log.isDebugEnabled()) {
__log.debug("addRoute: target=" + target + " correlationKey=" + key);
}
final MessageRouteDaoImpl mr = new MessageRouteDaoImpl((ProcessInstanceDaoImpl)target, routeId, key, idx);
_conn.defer(new Runnable() {
public void run() {
_routes.add(mr);
}
});
}
public boolean checkRoute(CorrelationKey ckey) {
return true;
}
void _removeRoutes(String routeGroupId, ProcessInstanceDaoImpl target) {
for (Iterator<MessageRouteDaoImpl> i = _routes.iterator(); i.hasNext();) {
MessageRouteDaoImpl we = i.next();
if ((we._groupId.equals(routeGroupId) || routeGroupId == null) && we._instance == target) {
i.remove();
}
}
}
/**
* @see java.lang.Object#toString()
*/
public String toString() {
StringBuffer buf = new StringBuffer("{CorrelatorDaoImpl corrId=");
buf.append(_correlatorId);
buf.append(" waiters=");
buf.append(_routes);
buf.append(" messages=");
buf.append(_messages);
buf.append('}');
return buf.toString();
}
private class MsgQueueEntry {
public final MessageExchangeDAO message;
public final CorrelationKey[] keys;
private MsgQueueEntry(MessageExchangeDAO mex,
CorrelationKey[] keys) {
this.message = mex;
this.keys = keys;
}
}
}