scouter.server.db.summary.SummaryWriter.scala Maven / Gradle / Ivy
/*
* Copyright 2015 the original author or authors.
* @https://github.com/scouter-project/scouter
*
* 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 scouter.server.db.summary;
import java.io.IOException;
import java.util.Hashtable;
import scouter.server.db.io.RealDataFile;
import scouter.util.FileUtil;
import scouter.util.IClose;
object SummaryWriter {
val table = new Hashtable[String, SummaryWriter]();
def open(file: String): SummaryWriter = {
table.synchronized {
var reader = table.get(file);
if (reader != null) {
reader.refrence += 1;
} else {
reader = new SummaryWriter(file);
table.put(file, reader);
}
return reader;
}
}
}
class SummaryWriter(file: String) extends IClose {
var refrence = 0;
val out = new RealDataFile(file + ".sum");
def write(bytes: Array[Byte]): Long = {
this.synchronized {
val point = out.getOffset();
out.writeInt(bytes.length);
out.write(bytes);
out.flush();
return point;
}
}
override def close() {
SummaryWriter.table.synchronized {
if (this.refrence == 0) {
SummaryWriter.table.remove(this.file)
FileUtil.close(out);
} else {
this.refrence -= 1
}
}
}
}