scouter.server.db.xlog.XLogProfileDataReader.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.xlog;
import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.Hashtable;
import java.util.Properties;
import scouter.server.Configure;
import scouter.server.db.io.zip.GZipStore;
import scouter.util.FileUtil;
import scouter.util.IClose;
object XLogProfileDataReader {
val table = new Hashtable[String, XLogProfileDataReader]();
def open(date: String, file: String): XLogProfileDataReader = {
table.synchronized {
var reader = table.get(file);
if (reader != null) {
reader.refrence += 1;
} else {
reader = new XLogProfileDataReader(date, file);
table.put(file, reader);
}
return reader;
}
}
}
class XLogProfileDataReader(date: String, file: String) extends IClose {
var refrence = 0;
val conf = Configure.getInstance();
private var profileFile: RandomAccessFile = null
private var gzip = conf.compress_profile_enabled
val confFile = new File(file + ".profile.conf");
if (confFile.exists()) {
val properties = FileUtil.readProperties(confFile);
this.gzip = "true".equalsIgnoreCase(properties.getProperty("compress_profile_enabled", ""+conf.compress_profile_enabled).trim());
}
val profile = new File(file + ".profile");
if (profile.canRead() == true) {
this.profileFile = new RandomAccessFile(profile, "r");
}
def read(pos: Long): Array[Byte] = {
if (this.gzip) {
return GZipStore.getInstance().read(date, pos);
}
if (profileFile == null)
return null;
try {
this.synchronized {
profileFile.seek(pos);
val len = profileFile.readInt();
val buffer = new Array[Byte](len);
profileFile.read(buffer);
return buffer;
}
} catch {
case e: IOException =>
throw new RuntimeException(e);
}
}
override def close() {
XLogProfileDataReader.table.synchronized {
if (this.refrence == 0) {
XLogProfileDataReader.table.remove(this.file);
try {
if (profileFile != null)
profileFile.close();
profileFile = null;
} catch {
case e: Throwable =>
e.printStackTrace();
}
} else {
this.refrence -= 1
}
}
}
}