/*
 * 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.axis2.clustering.tribes;

import org.apache.axiom.om.OMElement;
import org.apache.axis2.AxisFault;
import org.apache.axis2.description.AxisModule;
import org.apache.axis2.description.AxisService;
import org.apache.axis2.description.AxisServiceGroup;
import org.apache.axis2.description.Parameter;
import org.apache.axis2.engine.AxisConfiguration;
import org.apache.axis2.engine.AxisEvent;
import org.apache.axis2.engine.AxisObserver;

import java.util.ArrayList;

/**
 * AxisObserver which specifically handles setting of service & module classloaders for
 * message deserialization by Tribes
 */
public class TribesAxisObserver implements AxisObserver {
    public void init(AxisConfiguration axisConfiguration) {
        //Nothing to do
    }

    public void serviceUpdate(AxisEvent axisEvent, AxisService axisService) {
        //Nothing to do
    }

    public void serviceGroupUpdate(AxisEvent axisEvent, AxisServiceGroup axisServiceGroup) {
        if (axisEvent.getEventType() == AxisEvent.SERVICE_DEPLOY) {
            ClassLoaderUtil.addServiceGroupClassLoader(axisServiceGroup);
        } else if (axisEvent.getEventType() == AxisEvent.SERVICE_REMOVE) {
            ClassLoaderUtil.removeServiceGroupClassLoader(axisServiceGroup);
        }
    }

    public void moduleUpdate(AxisEvent axisEvent, AxisModule axisModule) {
        if (axisEvent.getEventType() == AxisEvent.MODULE_DEPLOY) {
            ClassLoaderUtil.addModuleClassLoader(axisModule);
        } else if (axisEvent.getEventType() == AxisEvent.MODULE_DEPLOY) {
            ClassLoaderUtil.removeModuleClassLoader(axisModule);
        }
    }

    public void addParameter(Parameter parameter) throws AxisFault {
        //Nothing to do
    }

    public void removeParameter(Parameter parameter) throws AxisFault {
        //Nothing to do
    }

    public void deserializeParameters(OMElement omElement) throws AxisFault {
        //Nothing to do
    }

    public Parameter getParameter(String carbonHome) {
        return null;          //Nothing to do
    }

    public ArrayList<Parameter> getParameters() {
        return null;          //Nothing to do
    }

    public boolean isParameterLocked(String carbonHome) {
        return false;         //Nothing to do
    }
}