/*
 * 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.ace.deployment.servlet;

import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.ace.deployment.processor.DeploymentProcessor;

/**
 * Provides a default deployment processor that simply streams all content from the deployment package back to the
 * client.
 */
public class DefaultDeploymentProcessor implements DeploymentProcessor {
    private static final int BUFFER_SIZE = 32 * 1024; // kB

    @Override
    public void process(InputStream inputStream, HttpServletRequest request, HttpServletResponse response) throws IOException {
        byte[] buffer = new byte[BUFFER_SIZE];

        OutputStream output = response.getOutputStream();
        try {
            for (int bytesRead = inputStream.read(buffer); bytesRead != -1; bytesRead = inputStream.read(buffer)) {
                output.write(buffer, 0, bytesRead);
            }
        }
        finally {
            closeSilently(output);
        }
    }

    private void closeSilently(Closeable output) {
        try {
            if (output != null) {
                output.close();
            }
        }
        catch (IOException e) {
            // Ignore; nothing we can do about this...
        }
    }
}