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The source code

/*
 * 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.handlers.soapmonitor;

import org.apache.axis2.AxisFault;
import org.apache.axis2.addressing.EndpointReference;
import org.apache.axis2.context.MessageContext;
import org.apache.axis2.handlers.AbstractHandler;
import org.apache.axis2.soapmonitor.servlet.SOAPMonitorConstants;
import org.apache.axis2.soapmonitor.servlet.SOAPMonitorService;

public class SOAPMonitorHandler extends AbstractHandler {

    private String name;

    private static long next_message_id = 1;

    /**
     * Constructor
     */
    public SOAPMonitorHandler() {
        super();
    }

    public String getName() {
        return name;
    }

    public void revoke(MessageContext msgContext) {
    }

    public void setName(String name) {
        this.name = name;
    }


    /**
     * Process and SOAP message
     */
    public InvocationResponse invoke(MessageContext messageContext) throws AxisFault {

        EndpointReference ref = null;

        // Get id, type and content
        Long id;
        Integer type;
        // 'soap request' must be called first
        if (messageContext.getFLOW() == MessageContext.IN_FLOW) {
            // show soap message inside the 'soap request' pane in the applet
            id = assignMessageId(messageContext);
            type = new Integer(SOAPMonitorConstants.SOAP_MONITOR_REQUEST);
            ref = messageContext.getTo();
        } else if (messageContext.getFLOW() == MessageContext.OUT_FLOW) {
            id = getMessageId(messageContext);
            // show soap message inside the 'soap response' pane in the applet
            type = new Integer(SOAPMonitorConstants.SOAP_MONITOR_RESPONSE);
            ref = messageContext.getFrom();
        } else if (messageContext.getFLOW() == MessageContext.IN_FAULT_FLOW) {
            id = getMessageId(messageContext);
            // show soap message inside the 'soap request' pane in the applet
            type = new Integer(SOAPMonitorConstants.SOAP_MONITOR_REQUEST);
            ref = messageContext.getFaultTo();
        } else if (messageContext.getFLOW() == MessageContext.OUT_FAULT_FLOW) {
            id = getMessageId(messageContext);
            // show soap message inside the 'soap response' pane in the applet
            type = new Integer(SOAPMonitorConstants.SOAP_MONITOR_RESPONSE);
            // TODO - How do I get an EPR on MessageContext.OUT_FAULT_FLOW ?
        } else {
            throw new IllegalStateException("unknown FLOW detected in messageContext: " + messageContext.getFLOW());
        }

        String target = null;
        if (ref != null) {
            target = ref.getAddress();
        }
        // Check for null target
        if (target == null) {
            target = "";
        }

        // Get the SOAP portion of the message
        String soap = null;
        if (messageContext.getEnvelope() != null) {
            soap = messageContext.getEnvelope().toString();
        }
        // If we have an id and a SOAP portion, then send the
        // message to the SOAP monitor service
        if ((id != null) && (soap != null)) {
            SOAPMonitorService.publishMessage(id, type, target, soap);
        }
        return InvocationResponse.CONTINUE;
    }

    /**
     * Assign a new message id
     */
    private Long assignMessageId(MessageContext messageContext) {
        Long id;
        synchronized (SOAPMonitorConstants.SOAP_MONITOR_ID) {
            id = new Long(next_message_id);
            next_message_id++;
        }
        messageContext.getOperationContext().setProperty(
                SOAPMonitorConstants.SOAP_MONITOR_ID, id);
        return id;
    }

    /**
     * Get the already assigned message id
     */
    private Long getMessageId(MessageContext messageContext) {
        Long id;
        id = (Long) messageContext.getOperationContext().getProperty(
                SOAPMonitorConstants.SOAP_MONITOR_ID);
        return id;
    }
}
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