WriterHandler.java

/**
 * 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.cxf.jca.core.logging;

import java.io.Writer;
import java.util.logging.ErrorManager;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.SimpleFormatter;

public class WriterHandler extends Handler {

    private boolean doneHeader;

    private Writer writer;

    public WriterHandler(Writer inWriter) {
        super();
        setLevel(Level.INFO);
        setFilter(null);
        setFormatter(new SimpleFormatter());
        writer = inWriter;

    }

    public synchronized void publish(final LogRecord record) {
        if (!isLoggable(record)) {
            return;
        }
        String msg;
        try {
            msg = getFormatter().format(record);
        } catch (Exception ex) {
            // We don't want to throw an exception here, but we
            // report the exception to any registered ErrorManager.
            reportError(null, ex, ErrorManager.FORMAT_FAILURE);
            return;
        }

        try {
            if (!doneHeader) {
                writer.write(getFormatter().getHead(this));
                doneHeader = true;
            }
            writer.write(msg);
        } catch (Exception ex) {
            // We don't want to throw an exception here, but we
            // report the exception to any registered ErrorManager.
            reportError(null, ex, ErrorManager.WRITE_FAILURE);
        }
    }

    public boolean isLoggable(final LogRecord record) {
        if (writer == null || record == null) {
            return false;
        }
        return super.isLoggable(record);
    }

    public synchronized void flush() {
        if (writer != null) {
            try {
                writer.flush();
            } catch (Exception ex) {
                // We don't want to throw an exception here, but we
                // report the exception to any registered ErrorManager.
                reportError(null, ex, ErrorManager.FLUSH_FAILURE);
            }
        }
    }

    private synchronized void flushAndClose() throws SecurityException {

        if (writer != null) {
            try {
                if (!doneHeader) {
                    writer.write(getFormatter().getHead(this));
                    doneHeader = true;
                }
                writer.write(getFormatter().getTail(this));
                writer.flush();
                writer.close();
            } catch (Exception ex) {
                // We don't want to throw an exception here, but we
                // report the exception to any registered ErrorManager.
                reportError(null, ex, ErrorManager.CLOSE_FAILURE);
            }
            writer = null;

        }
    }

    public synchronized void close() throws SecurityException {
        flushAndClose();
    }
}