org.springframework.boot.actuate.trace.http.InMemoryHttpTraceRepository Maven / Gradle / Ivy
/*
* Copyright 2012-2018 the original author or 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
*
* https://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.springframework.boot.actuate.trace.http;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
/**
* In-memory implementation of {@link HttpTraceRepository}.
*
* @author Dave Syer
* @author Olivier Bourgain
* @since 2.0.0
*/
public class InMemoryHttpTraceRepository implements HttpTraceRepository {
private int capacity = 100;
private boolean reverse = true;
private final List traces = new LinkedList<>();
/**
* Flag to say that the repository lists traces in reverse order.
* @param reverse flag value (default true)
*/
public void setReverse(boolean reverse) {
synchronized (this.traces) {
this.reverse = reverse;
}
}
/**
* Set the capacity of the in-memory repository.
* @param capacity the capacity
*/
public void setCapacity(int capacity) {
synchronized (this.traces) {
this.capacity = capacity;
}
}
@Override
public List findAll() {
synchronized (this.traces) {
return Collections.unmodifiableList(new ArrayList<>(this.traces));
}
}
@Override
public void add(HttpTrace trace) {
synchronized (this.traces) {
while (this.traces.size() >= this.capacity) {
this.traces.remove(this.reverse ? this.capacity - 1 : 0);
}
if (this.reverse) {
this.traces.add(0, trace);
}
else {
this.traces.add(trace);
}
}
}
}