// Copyright 2017 JanusGraph Authors
//
// 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 org.janusgraph.graphdb.query.profile;
import com.google.common.base.Preconditions;
import org.apache.commons.lang3.StringUtils;
import java.util.*;
/**
* @author Matthias Broecheler (me@matthiasb.com)
*/
public class SimpleQueryProfiler implements QueryProfiler, Iterable<SimpleQueryProfiler> {
private final List<SimpleQueryProfiler> nestedProfilers = new ArrayList<>();
private final Map<String,Object> annotations = new HashMap<>();
private final String groupName;
private long resultSize = 0;
private long startTimeNs = 0;
private boolean runningTimer = false;
private long measuredTimeNs = 0;
public SimpleQueryProfiler() {
this("__root");
}
public SimpleQueryProfiler(final String groupName) {
Preconditions.checkArgument(StringUtils.isNotBlank(groupName));
this.groupName=groupName;
}
@Override
public QueryProfiler addNested(String groupName) {
SimpleQueryProfiler nested = new SimpleQueryProfiler(groupName);
nestedProfilers.add(nested);
return nested;
}
public String getGroupName() {
return groupName;
}
@Override
public QueryProfiler setAnnotation(String key, Object value) {
Preconditions.checkArgument(StringUtils.isNotBlank(key), "Must provide a key");
annotations.put(key,convert(value));
return this;
}
private Object convert(Object value) {
Preconditions.checkArgument(value != null, "Value may not be null");
// if (value instanceof CharSequence) return value.toString();
// if (value instanceof Number || value instanceof Boolean) return value;
// if (value.getClass().isEnum()) return value;
// return value.toString();
return value;
}
@Override
public void startTimer() {
Preconditions.checkArgument(!runningTimer,"A timer is already running");
startTimeNs = System.nanoTime();
runningTimer = true;
}
@Override
public void stopTimer() {
Preconditions.checkArgument(runningTimer,"No timer running");
measuredTimeNs+=(System.nanoTime()-startTimeNs);
runningTimer=false;
}
@Override
public void setResultSize(long size) {
Preconditions.checkArgument(size>=0);
this.resultSize=size;
}
//RETRIEVAL METHODS
@Override
public Iterator<SimpleQueryProfiler> iterator() {
return nestedProfilers.iterator();
}
public<O> O getAnnotation(String key) {
return (O)annotations.get(key);
}
public Map<String,Object> getAnnotations() {
return annotations;
}
public long getTotalTime() {
return measuredTimeNs;
}
public long getResultSize() {
return resultSize;
}
}