/*
* 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.synapse.mediators.ext;
import org.apache.synapse.ManagedLifecycle;
import org.apache.synapse.Mediator;
import org.apache.synapse.MessageContext;
import org.apache.synapse.SynapseException;
import org.apache.synapse.SynapseLog;
import org.apache.synapse.core.SynapseEnvironment;
import org.apache.synapse.mediators.AbstractMediator;
import java.util.HashMap;
import java.util.Map;
/**
* The class mediator delegates the mediation to a single instance of a specified
* class. The specified class must implement the Mediator interface and optionally
* may implement the ManagedLifecycle interface. At initialization time, a single
* instance of the class is instantiated using a public no argument constructor, and
* any one-time properties (parameter constants specified through the Synapse config)
* are set on the instance. If each request needs synchronization, the user must
* implement it within the specified class.
*
* @see Mediator
*/
public class ClassMediator extends AbstractMediator implements ManagedLifecycle {
/** The reference to the actual class that implments the Mediator interface */
private Mediator mediator = null;
/** A list of simple properties that would be set on the class before being used */
private final Map<String, Object> properties = new HashMap<String, Object>();
/**
* Don't use a new instance... do one instance of the object per instance of
* this mediator
*
* @param synCtx
* the message context
* @return as per standard semantics
*/
public boolean mediate(MessageContext synCtx) {
SynapseLog synLog = getLog(synCtx);
if (synLog.isTraceOrDebugEnabled()) {
synLog.traceOrDebug("Start : Class mediator");
if (synLog.isTraceTraceEnabled()) {
synLog.traceTrace("Message : " + synCtx.getEnvelope());
}
}
if (synLog.isTraceOrDebugEnabled()) {
synLog.traceOrDebug("invoking : " + mediator.getClass() + ".mediate()");
}
boolean result;
try {
result = mediator.mediate(synCtx);
} catch (Exception e) {
// throw Synapse Exception for any exception in class meditor
// so that the fault handler will be invoked
throw new SynapseException("Error occured in the mediation of the class mediator", e);
}
synLog.traceOrDebug("End : Class mediator");
return result;
}
public void destroy() {
if (log.isDebugEnabled()) {
log.debug("Destroying class mediator instance for : " + mediator.getClass());
}
if (mediator instanceof ManagedLifecycle) {
((ManagedLifecycle) mediator).destroy();
}
}
public void init(SynapseEnvironment se) {
if (log.isDebugEnabled()) {
log.debug("Initializing class mediator instance for : " + mediator.getClass());
}
if (mediator == null) {
log.warn("init() called before mediator reference set");
return;
}
if (mediator instanceof ManagedLifecycle) {
((ManagedLifecycle) mediator).init(se);
}
}
public void setMediator(Mediator mediator) {
this.mediator = mediator;
}
public Mediator getMediator() {
return mediator;
}
public void addProperty(String name, Object value) {
properties.put(name, value);
}
public Map getProperties() {
return this.properties;
}
}