scouter.server.db.counter.DailyCounterIndex.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.counter
import java.util.Hashtable
import scouter.server.db.io.IndexKeyFile
import scouter.io.DataInputX
import scouter.io.DataOutputX
import scouter.util.FileUtil
import scouter.util.IClose;
object DailyCounterIndex {
val table = new Hashtable[String, DailyCounterIndex]();
def open(fileName: String): DailyCounterIndex = {
table.synchronized {
var index = table.get(fileName);
if (index != null) {
index.refrence += 1;
return index;
} else {
index = new DailyCounterIndex(fileName)
table.put(fileName, index);
return index;
}
}
}
}
class DailyCounterIndex(_fileName: String) extends IClose {
var refrence = 0
val fileName = _fileName
var index: IndexKeyFile = new IndexKeyFile(fileName)
def set(key: Array[Byte], dataOffset: Long) {
if (this.index == null) {
this.index = new IndexKeyFile(fileName)
}
this.index.put(key, DataOutputX.toBytes5(dataOffset));
}
def get(key: Array[Byte]): Long = {
if (this.index == null) {
this.index = new IndexKeyFile(fileName);
}
val dataOffsetBuff = this.index.get(key);
if (dataOffsetBuff == null) -1 else DataInputX.toLong5(dataOffsetBuff, 0)
}
def read(handler: (Array[Byte], Array[Byte]) => Unit, reader: (Long)=>Array[Byte]) {
if (this.index == null) {
this.index = new IndexKeyFile(fileName);
}
this.index.read(handler, reader);
}
def read(handler: (Array[Byte], Array[Byte]) => Any) {
if (this.index == null) {
this.index = new IndexKeyFile(fileName);
}
this.index.read(handler);
}
def close() {
DailyCounterIndex.table.synchronized {
if (this.refrence == 0) {
DailyCounterIndex.table.remove(this.fileName);
FileUtil.close(this.index);
} else {
this.refrence -= 1;
}
}
}
def closeForce() {
DailyCounterIndex.table.synchronized {
DailyCounterIndex.table.remove(this.fileName);
FileUtil.close(this.index);
this.index = null;
this.refrence = 0;
}
}
}