org.saiku.reporting.backend.util.LogOutputStream.java Source code

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Here is the source code for org.saiku.reporting.backend.util.LogOutputStream.java

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/*******************************************************************************
 * Copyright 2013 Marius Giepz
 * 
 * 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 org.saiku.reporting.backend.util;

import java.io.OutputStream;

import org.apache.commons.logging.Log;
import org.saiku.reporting.backend.service.SaikuProperties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * This class logs all bytes written to it as output stream with a specified logging level.
 *
 * @author <a href="mailto:cspannagel@web.de">Christian Spannagel</a>
 * @version 1.0
 */
public class LogOutputStream extends OutputStream {
    /** The logger where to log the written bytes. */
    private Logger logger;

    /** The internal memory for the written bytes. */
    private String mem;

    /**
     * Creates a new log output stream which logs bytes to the specified logger with the specified
     * level.
     *
     * @param logger the logger where to log the written bytes
     * @param level the level
     */
    public LogOutputStream(Logger logger) {
        setLogger(logger);
        mem = "";
    }

    /**
     * Sets the logger where to log the bytes.
     *
     * @param logger the logger
     */
    public void setLogger(Logger logger) {
        this.logger = logger;
    }

    /**
     * Returns the logger.
     *
     * @return DOCUMENT ME!
     */
    public Logger getLogger() {
        return logger;
    }

    /**
     * Writes a byte to the output stream. This method flushes automatically at the end of a line.
     *
     * @param b DOCUMENT ME!
     */
    public void write(int b) {
        byte[] bytes = new byte[1];
        bytes[0] = (byte) (b & 0xff);
        mem = mem + new String(bytes);

        if (mem.endsWith("\n")) {
            mem = mem.substring(0, mem.length() - 1);
            flush();
        }
    }

    /**
     * Flushes the output stream.
     */
    public void flush() {
        logger.info(mem);
        mem = "";
    }
}