SocketAcceptorHelper.java

/**
 * Copyright (c) 2009-2011 VMware, Inc. All Rights Reserved.
 *
 * Licensed 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 com.springsource.insight.plugin.socket;

import java.io.Closeable;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.util.logging.Logger;

import com.springsource.insight.intercept.operation.Operation;

/**
 *
 */
public abstract class SocketAcceptorHelper<T> implements Runnable, Closeable {
    private Operation operation;
    private IOException exception;
    private final int port;
    protected final Logger logger = Logger.getLogger(getClass().getName());

    protected SocketAcceptorHelper(final int listenPort) {
        port = listenPort;
    }

    public int getListenPort() {
        return port;
    }

    public Operation getOperation() {
        return operation;
    }

    public IOException getException() {
        return exception;
    }

    public void run() {
        try {
            logger.info("Start wait on " + getListenPort());
            T connection = waitForConnection();
            try {
                Socket sock = resolveClientSocket(connection);
                InetAddress addr = sock.getInetAddress();
                String addrValue = addr.getHostAddress();
                logger.info("Accepted connection from " + addrValue);
                operation = SocketDefinitions.initializeOperation(
                        new Operation(), SocketDefinitions.ACCEPT_ACTION, addrValue, getListenPort());
            } finally {
                close(connection);
            }
        } catch (IOException e) {
            exception = e;
        }
    }

    protected abstract void close(T conn) throws IOException;

    protected abstract Socket resolveClientSocket(T conn) throws IOException;

    protected abstract T waitForConnection() throws IOException;
}