/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.instrument.context;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.ConcurrentLinkedDeque;
public class MetricContext {
private final TracingOptions tracingOptions;
private final ConcurrentLinkedDeque<MetricSnapshot> arabesqueQueue = new ConcurrentLinkedDeque<>();
private final LinkedList<MetricSnapshot> outputList = new LinkedList<>();
private final long startTime;
public MetricContext (TracingOptions tracingOptions) {
this.tracingOptions = tracingOptions;
startTime = System.currentTimeMillis();
}
public boolean hasAged () {
long minimumLiveSeconds;
return ((minimumLiveSeconds = tracingOptions.getMinimumLiveMilliseconds()) >= 0) && (System.currentTimeMillis() - startTime >= minimumLiveSeconds);
}
public void append (MetricContext metricContext) {
if (this != metricContext) {
List<MetricSnapshot> appendList;
if (((appendList = metricContext.getSnapshots()) != null) && (!appendList.isEmpty())) {
outputList.addAll(appendList);
}
}
}
public boolean pushSnapshot (MetricAddress metricAddress) {
MetricSnapshot metricSnapshot;
arabesqueQueue.addFirst(metricSnapshot = new MetricSnapshot(metricAddress, tracingOptions));
outputList.addLast(metricSnapshot);
return true;
}
public void popSnapshot () {
if (!arabesqueQueue.isEmpty()) {
arabesqueQueue.removeFirst();
}
}
public MetricSnapshot getSnapshot () {
if (arabesqueQueue.isEmpty()) {
return null;
}
return arabesqueQueue.getFirst();
}
public boolean isEmpty () {
if (outputList.isEmpty()) {
return true;
}
for (MetricSnapshot snapshot : outputList) {
if (!snapshot.isEmpty()) {
return false;
}
}
return true;
}
public List<MetricSnapshot> getSnapshots () {
return Collections.unmodifiableList(outputList);
}
@Override
public String toString () {
StringBuilder contextBuilder = new StringBuilder();
boolean firstContext = true;
contextBuilder.append(System.currentTimeMillis() - startTime).append('-');
for (MetricSnapshot snapshot : outputList) {
if (!snapshot.isEmpty()) {
if (!firstContext) {
contextBuilder.append(',');
}
contextBuilder.append('[').append(snapshot).append(']');
firstContext = false;
}
}
return contextBuilder.toString();
}
}