/*
* 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.stratos.messaging.message.processor.topology;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.stratos.messaging.domain.topology.Cluster;
import org.apache.stratos.messaging.domain.topology.Member;
import org.apache.stratos.messaging.domain.topology.MemberStatus;
import org.apache.stratos.messaging.domain.topology.Service;
import org.apache.stratos.messaging.domain.topology.Topology;
import org.apache.stratos.messaging.event.topology.MemberSuspendedEvent;
import org.apache.stratos.messaging.message.filter.topology.TopologyClusterFilter;
import org.apache.stratos.messaging.message.filter.topology.TopologyMemberFilter;
import org.apache.stratos.messaging.message.filter.topology.TopologyServiceFilter;
import org.apache.stratos.messaging.message.processor.MessageProcessor;
import org.apache.stratos.messaging.util.Util;
public class MemberSuspendedMessageProcessor extends MessageProcessor {
private static final Log log = LogFactory.getLog(MemberSuspendedMessageProcessor.class);
private MessageProcessor nextProcessor;
@Override
public void setNext(MessageProcessor nextProcessor) {
this.nextProcessor = nextProcessor;
}
@Override
public boolean process(String type, String message, Object object) {
Topology topology = (Topology) object;
if (MemberSuspendedEvent.class.getName().equals(type)) {
// Return if topology has not been initialized
if (!topology.isInitialized())
return false;
// Parse complete message and build event
MemberSuspendedEvent event = (MemberSuspendedEvent) Util.jsonToObject(message, MemberSuspendedEvent.class);
// Apply service filter
if (TopologyServiceFilter.getInstance().isActive()) {
if (TopologyServiceFilter.getInstance().serviceNameExcluded(event.getServiceName())) {
// Service is excluded, do not update topology or fire event
if (log.isDebugEnabled()) {
log.debug(String.format("Service is excluded: [service] %s", event.getServiceName()));
}
return false;
}
}
// Apply cluster filter
if (TopologyClusterFilter.getInstance().isActive()) {
if (TopologyClusterFilter.getInstance().clusterIdExcluded(event.getClusterId())) {
// Cluster is excluded, do not update topology or fire event
if (log.isDebugEnabled()) {
log.debug(String.format("Cluster is excluded: [cluster] %s", event.getClusterId()));
}
return false;
}
}
// Validate event against the existing topology
Service service = topology.getService(event.getServiceName());
if (service == null) {
if (log.isWarnEnabled()) {
log.warn(String.format("Service does not exist: [service] %s",
event.getServiceName()));
}
return false;
}
Cluster cluster = service.getCluster(event.getClusterId());
if (cluster == null) {
if (log.isWarnEnabled()) {
log.warn(String.format("Cluster does not exist: [service] %s [cluster] %s",
event.getServiceName(), event.getClusterId()));
}
return false;
}
Member member = cluster.getMember(event.getMemberId());
if (member == null) {
if (log.isWarnEnabled()) {
log.warn(String.format("Member does not exist: [service] %s [cluster] %s [member] %s",
event.getServiceName(),
event.getClusterId(),
event.getMemberId()));
}
return false;
}
// Apply member filter
if(TopologyMemberFilter.getInstance().isActive()) {
if(TopologyMemberFilter.getInstance().lbClusterIdExcluded(member.getLbClusterId())) {
if (log.isDebugEnabled()) {
log.debug(String.format("Member is excluded: [lb-cluster-id] %s", member.getLbClusterId()));
}
return false;
}
}
if (member.getStatus() == MemberStatus.Suspended) {
if (log.isWarnEnabled()) {
log.warn(String.format("Member already suspended: [service] %s [cluster] %s [member] %s",
event.getServiceName(),
event.getClusterId(),
event.getMemberId()));
}
} else {
// Apply changes to the topology
member.setStatus(MemberStatus.Suspended);
if (log.isInfoEnabled()) {
log.info(String.format("Member suspended: [service] %s [cluster] %s [member] %s",
event.getServiceName(),
event.getClusterId(),
event.getMemberId()));
}
}
notifyEventListeners(event);
return true;
} else {
if (nextProcessor != null) {
// ask the next processor to take care of the message.
return nextProcessor.process(type, message, topology);
} else {
throw new RuntimeException(String.format("Failed to process message using available message processors: [type] %s [body] %s", type, message));
}
}
}
}