/*
* 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.filters;
import org.apache.synapse.ContinuationState;
import org.apache.synapse.Mediator;
import org.apache.synapse.MessageContext;
import org.apache.synapse.SynapseLog;
import org.apache.synapse.aspects.AspectConfiguration;
import org.apache.synapse.aspects.ComponentType;
import org.apache.synapse.aspects.flow.statistics.StatisticIdentityGenerator;
import org.apache.synapse.aspects.flow.statistics.collectors.OpenEventCollector;
import org.apache.synapse.aspects.flow.statistics.collectors.RuntimeStatisticCollector;
import org.apache.synapse.aspects.flow.statistics.data.artifact.ArtifactHolder;
import org.apache.synapse.continuation.ContinuationStackManager;
import org.apache.synapse.core.SynapseEnvironment;
import org.apache.synapse.mediators.AbstractListMediator;
import org.apache.synapse.mediators.FlowContinuableMediator;
/**
* The In Mediator acts only on "incoming" messages into synapse. This is
* performed by looking at the result of MessageContext#isResponse()
*
* @see org.apache.synapse.MessageContext#isResponse()
*/
public class InMediator extends AbstractListMediator implements org.apache.synapse.mediators.FilterMediator,
FlowContinuableMediator {
/**
* Executes the list of sub/child mediators, if the filter condition is satisfied
*
* @param synCtx the current message
* @return true if filter condition fails. else returns as per List mediator semantics
*/
public boolean mediate(MessageContext synCtx) {
if (synCtx.getEnvironment().isDebuggerEnabled()) {
if (super.divertMediationRoute(synCtx)) {
return true;
}
}
SynapseLog synLog = getLog(synCtx);
if (synLog.isTraceOrDebugEnabled()) {
synLog.traceOrDebug("Start : In mediator");
if (synLog.isTraceTraceEnabled()) {
synLog.traceTrace("Message : " + synCtx.getEnvelope());
}
}
boolean result = true;
if (test(synCtx)) {
synLog.traceOrDebug("Current message is incoming - executing child mediators");
ContinuationStackManager.addReliantContinuationState(synCtx, 0, getMediatorPosition());
result = super.mediate(synCtx);
if (result) {
ContinuationStackManager.removeReliantContinuationState(synCtx);
}
} else {
synLog.traceOrDebug("Current message is a response - skipping child mediators");
}
synLog.traceOrDebug("End : In mediator");
return result;
}
public boolean mediate(MessageContext synCtx,
ContinuationState continuationState) {
SynapseLog synLog = getLog(synCtx);
if (synLog.isTraceOrDebugEnabled()) {
synLog.traceOrDebug("In mediator : Mediating from ContinuationState");
}
boolean result;
if (!continuationState.hasChild()) {
result = super.mediate(synCtx, continuationState.getPosition() + 1);
} else {
FlowContinuableMediator mediator =
(FlowContinuableMediator) getChild(continuationState.getPosition());
result = mediator.mediate(synCtx, continuationState.getChildContState());
if (RuntimeStatisticCollector.isStatisticsEnabled()) {
((Mediator) mediator).reportCloseStatistics(synCtx, null);
}
}
return result;
}
/**
* Apply mediation only on request messages
*
* @param synCtx the message context
* @return MessageContext#isResponse()
*/
public boolean test(MessageContext synCtx) {
return !synCtx.isResponse();
}
@Override
public boolean isContentAware() {
return false;
}
public void init(SynapseEnvironment se) {
super.init(se);
}
@Override
public Integer reportOpenStatistics(MessageContext messageContext, boolean isContentAltering) {
if (!messageContext.isResponse()) {
return OpenEventCollector
.reportFlowContinuableEvent(messageContext, getMediatorName(), ComponentType.MEDIATOR,
getAspectConfiguration(), isContentAltering() || isContentAltering);
}
return null;
}
@Override
public void setComponentStatisticsId(ArtifactHolder holder) {
if (getAspectConfiguration() == null) {
configure(new AspectConfiguration(getMediatorName()));
}
String mediatorId =
StatisticIdentityGenerator.getIdForFlowContinuableMediator(getMediatorName(), ComponentType.MEDIATOR, holder);
getAspectConfiguration().setUniqueId(mediatorId);
setStatisticIdForMediators(holder);
StatisticIdentityGenerator.reportingFlowContinuableEndEvent(mediatorId, ComponentType.MEDIATOR, holder);
}
}