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Java example source code file (LoggingSessionInputBuffer.java)

This example source code file (LoggingSessionInputBuffer.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java tags/keywords

chararraybuffer, eol, httptransportmetrics, immutable, io, ioexception, loggingsessioninputbuffer, sessioninputbuffer, string, wire

The LoggingSessionInputBuffer.java example 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

package org.apache.http.impl.conn;

import java.io.IOException;

import org.apache.http.annotation.Immutable;

import org.apache.http.io.HttpTransportMetrics;
import org.apache.http.io.SessionInputBuffer;
import org.apache.http.util.CharArrayBuffer;

/**
 * Logs all data read to the wire LOG.
 *
 * 
 * @since 4.0
 */
@Immutable
public class LoggingSessionInputBuffer implements SessionInputBuffer {
     
    /** Original session input buffer. */
    private final SessionInputBuffer in;

    /** The wire log to use for writing. */
    private final Wire wire;
    
    /**
     * Create an instance that wraps the specified session input buffer.
     * @param in The session input buffer.
     * @param wire The wire log to use.
     */
    public LoggingSessionInputBuffer(final SessionInputBuffer in, final Wire wire) {
        super();
        this.in = in;
        this.wire = wire;
    }

    public boolean isDataAvailable(int timeout) throws IOException {
        return this.in.isDataAvailable(timeout);
    }

    public int read(byte[] b, int off, int len) throws IOException {
        int l = this.in.read(b,  off,  len);
        if (this.wire.enabled() && l > 0) {
            this.wire.input(b, off, l);
        }
        return l;
    }

    public int read() throws IOException {
        int l = this.in.read();
        if (this.wire.enabled() && l != -1) { 
            this.wire.input(l);
        }
        return l;
    }

    public int read(byte[] b) throws IOException {
        int l = this.in.read(b);
        if (this.wire.enabled() && l > 0) {
            this.wire.input(b, 0, l);
        }
        return l;
    }

    public String readLine() throws IOException {
        String s = this.in.readLine();
        if (this.wire.enabled() && s != null) {
            this.wire.input(s + "[EOL]");
        }
        return s;
    }

    public int readLine(final CharArrayBuffer buffer) throws IOException {
        int l = this.in.readLine(buffer);
        if (this.wire.enabled() && l >= 0) {
            int pos = buffer.length() - l;
            String s = new String(buffer.buffer(), pos, l);
            this.wire.input(s + "[EOL]");
        }
        return l;
    }

    public HttpTransportMetrics getMetrics() {
        return this.in.getMetrics();
    }

}

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