scouter.server.db.DBCtr.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;
import scouter.server.Configure
import scouter.server.ShutdownManager
import scouter.util.IShutdown;
import java.io.File
object DBCtr {
val MAX_QUE_SIZE = 10000;
val MAX_DIV = 20;
val LARGE_MAX_QUE_SIZE = 100000;
def getRootPath() = Configure.getInstance().db_dir
var running = true;
ShutdownManager.add(new IShutdown() {
override def shutdown() {
running = false;
}
})
def updateLock() {
val lock = new File(getRootPath, "lock.dat")
if (lock.canWrite()) {
lock.setLastModified(System.currentTimeMillis());
}
}
def createLock(): Boolean = {
val dir = new File(getRootPath)
if (dir.canRead() == false) {
dir.mkdirs()
}
val lock = new File(getRootPath, "lock.dat")
if (lock.exists() && lock.lastModified() < System.currentTimeMillis() - 5000) {
lock.delete();
}
val ok = lock.createNewFile();
if (ok) {
lock.deleteOnExit();
} else {
println("Can't lock the database")
println("Please remove the lock : " + lock.getAbsoluteFile())
}
return ok;
}
}