scouter.server.core.cache.AlertScriptLoadMessageLoopCache.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.core.cache
import java.util.{ArrayList, List}
class AlertScriptLoadMessageLoopCache(capacity: Int) {
val queue = new Array[Any](capacity);
var index = 0;
var loop = 0L;
def put(record: String) {
queue.synchronized {
queue(index) = record;
index += 1;
if (index >= queue.length) {
loop += 1;
index = 0;
}
}
}
def getList(start_loop: Long, start_index: Int): List[String] = {
val end_index = this.index;
val end_loop = this.loop;
val buff = new ArrayList[String](queue.length);
(end_loop - start_loop) match {
case 0 =>
if (start_index < end_index) {
copy(buff, start_index, end_index);
}
case 1 =>
if (start_index <= end_index) {
copy(buff, end_index, queue.length);
copy(buff, 0, end_index);
} else {
copy(buff, start_index, queue.length);
copy(buff, 0, end_index);
}
case _ =>
copy(buff, end_index, queue.length);
copy(buff, 0, end_index);
}
return buff;
}
def copy(buff: List[String], _from: Int, _to: Int) {
var i = _from
while (i < _to) {
if (queue(i) != null) {
buff.add(queue(i).asInstanceOf[String]);
}
i += 1
}
}
def get(last_loop: Long, last_index: Int): CacheOut[String] = {
val d = new CacheOut[String]();
d.data = getList(last_loop, last_index);
d.loop = this.loop;
d.index = this.index;
return d;
}
}