RequestMessageTransformProcessor.java

/*
 * Copyright (c) 2017, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. 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.wso2.carbon.transport.http.netty.contentaware;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.wso2.carbon.messaging.CarbonCallback;
import org.wso2.carbon.messaging.CarbonMessage;
import org.wso2.carbon.messaging.CarbonMessageProcessor;
import org.wso2.carbon.messaging.ClientConnector;
import org.wso2.carbon.messaging.TransportSender;
import org.wso2.carbon.messaging.exceptions.ClientConnectorException;
import org.wso2.carbon.transport.http.netty.common.Constants;
import org.wso2.carbon.transport.http.netty.util.TestUtil;

import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * Message processor for transform request message
 */
public class RequestMessageTransformProcessor implements CarbonMessageProcessor {

    private Logger logger = LoggerFactory.getLogger(RequestMessageTransformProcessor.class);

    private String transformedValue;

    private ClientConnector clientConnector;

    private ExecutorService executor = Executors.newSingleThreadExecutor();

    public RequestMessageTransformProcessor(String transformedValue) {
        this.transformedValue = transformedValue;
    }

    @Override
    public boolean receive(CarbonMessage carbonMessage, CarbonCallback carbonCallback) throws Exception {
        executor.execute(new Runnable() {
            @Override
            public void run() {
                if (carbonMessage.getProperty(org.wso2.carbon.messaging.Constants.DIRECTION) != null && carbonMessage
                        .getProperty(org.wso2.carbon.messaging.Constants.DIRECTION)
                        .equals(org.wso2.carbon.messaging.Constants.DIRECTION_RESPONSE)) {

                    carbonCallback.done(carbonMessage);
                } else {
                    List<ByteBuffer> byteBufferList = carbonMessage.getFullMessageBody();
                    carbonMessage.setProperty(Constants.HOST, TestUtil.TEST_HOST);
                    carbonMessage.setProperty(Constants.PORT, TestUtil.TEST_SERVER_PORT);

                    try {
                        if (transformedValue != null) {
                            byte[] array = transformedValue.getBytes("UTF-8");
                            ByteBuffer byteBuffer = ByteBuffer.allocate(array.length);
                            byteBuffer.put(array);
                            carbonMessage.setHeader(Constants.HTTP_CONTENT_LENGTH, String.valueOf(array.length));
                            byteBuffer.flip();
                            carbonMessage.addMessageBody(byteBuffer);
                            carbonMessage.setEndOfMsgAdded(true);
                            clientConnector.send(carbonMessage, carbonCallback);
                        }
                    } catch (UnsupportedEncodingException e) {
                        logger.error("Unsupported Exception", e);
                    } catch (ClientConnectorException e) {
                        logger.error("MessageProcessor Exception", e);
                    }
                }
            }
        });

        return false;
    }

    @Override
    public void setTransportSender(TransportSender transportSender) {
    }

    @Override
    public void setClientConnector(ClientConnector clientConnector) {
        this.clientConnector = clientConnector;
    }

    @Override
    public String getId() {
        return null;
    }
}