/*
* 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.isis.core.runtime.logging;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.io.RandomAccessFile;
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class SnapshotWriter {
private static final Format FORMAT = new SimpleDateFormat("yyyyMMdd-HHmmss-SSS");
private final PrintStream os;
public SnapshotWriter(final String directoryPath, final String baseFileName, final String fileExtension, final String message) throws IOException {
final File dir = new File(directoryPath == null || directoryPath.length() == 0 ? "." : directoryPath);
if (!dir.exists()) {
@SuppressWarnings("unused")
final boolean created = dir.mkdirs();
}
final File indexFile = new File(dir, "index.txt");
final Date date = new Date();
final File logFile = new File(dir, baseFileName + FORMAT.format(date) + "." + fileExtension);
final RandomAccessFile index = new RandomAccessFile(indexFile, "rw");
index.seek(index.length());
index.writeBytes(logFile.getName() + ": " + message + "\n");
index.close();
os = new PrintStream(new FileOutputStream(logFile));
}
public void appendLog(final String details) {
os.println(details);
}
public void close() {
if (os != null) {
os.close();
}
}
}