com.addthis.muxy.WritableMuxFile Maven / Gradle / Ivy

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/*
 * 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 com.addthis.muxy;

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

import com.addthis.basis.util.JitterClock;

import com.google.common.base.Throwables;

public class WritableMuxFile extends AbstractMuxFile {

    private final MuxFileDirectory writeDir;

    public WritableMuxFile(MuxFileDirectory writeDir) {
        super(writeDir.eventListener);
        this.writeDir = writeDir;
    }

    public WritableMuxFile(InputStream in, MuxFileDirectory writeDir) throws IOException {
        super(writeDir, in);
        this.writeDir = writeDir;
    }

    public void sync() throws IOException {
        writeDir.getStreamManager().writeStreamsToBlock();
    }

    public void setName(String newName) throws IOException {
        writeDir.acquireWritable();
        String oldName = fileName;
        synchronized (writeDir) {
            writeDir.fileMap.remove(oldName);
            if (newName != null) {
                if (writeDir.exists(newName)) {
                    WritableMuxFile muxFile = (WritableMuxFile) writeDir.fileMap.get(newName);
                    muxFile.delete();
                }
                writeDir.fileMap.put(newName, this);
            } else {
                /* delete associated stream ids */
                getStreamIds().forEachOrdered(value -> {
                    try {
                        writeDir.getStreamManager().deleteStream(value);
                    } catch (IOException e) {
                        Throwables.propagate(e);
                    }
                });
            }
        }
        fileName = newName;
        if (newName != null) {
            writeDir.publishEvent(MuxyFileEvent.FILE_RENAME, new Object[]{oldName, newName});
        } else {
            writeDir.publishEvent(MuxyFileEvent.FILE_DELETE, oldName);
        }
    }

    public void delete() throws IOException {
        setName(null);
    }

    public OutputStream append() throws IOException {
        writeDir.publishEvent(MuxyFileEvent.FILE_APPEND, this);
        return writeDir.newStreamsOutput(this);
    }

    public OutputStream append(boolean compress) throws IOException {
        writeDir.publishEvent(MuxyFileEvent.FILE_APPEND, this);
        return writeDir.newStreamsOutput(this, compress);
    }

    public void addData(int bytes) throws IOException {
        writeDir.globalBytesWritten.addAndGet(bytes);
        length += bytes;
        lastModified = JitterClock.globalTime();
    }

    public void addStream(MuxStream stream) throws IOException {
        streams.add(stream);
    }
}