org.prebake.service.ClientChannel.java Source code

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Here is the source code for org.prebake.service.ClientChannel.java

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// Copyright 2010, Mike Samuel
//
// 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.prebake.service;

import java.io.Closeable;
import java.io.Flushable;
import java.util.logging.Handler;
import java.util.logging.LogRecord;

import com.google.common.io.Flushables;

/**
 * A log handler that channels log output to clients for the time their
 * operations are being processed.
 *
 * @author Mike Samuel <mikesamuel@gmail.com>
 */
final class ClientChannel extends Handler implements Closeable {
    final LogRecordWriter out;

    ClientChannel(Appendable out) {
        this.out = new LogRecordWriter(out);
    }

    @Override
    public void close() {
        out.close();
    }

    @Override
    public void flush() {
        out.flush();
    }

    @Override
    public void publish(LogRecord r) {
        out.writeRecord(r);
        Appendable underlying = out.out;
        if (underlying instanceof Flushable) {
            Flushables.flushQuietly((Flushable) underlying);
        }
    }
}