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Add flag to TraceRepository to reverse order of listing
Default to true (so existing apps change their behaviour, but that seems to be the majority vote). Fixes gh-2794
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@ -16,9 +16,9 @@
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package org.springframework.boot.actuate.trace;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Date;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Map;
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@ -31,7 +31,18 @@ public class InMemoryTraceRepository implements TraceRepository {
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private int capacity = 100;
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private final List<Trace> traces = new ArrayList<Trace>();
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private boolean reverse = true;
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private final List<Trace> traces = new LinkedList<Trace>();
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/**
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* Flag to say that the repository lists traces in reverse order.
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*
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* @param reverse flag value (default true)
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*/
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public void setReverse(boolean reverse) {
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this.reverse = reverse;
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}
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/**
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* @param capacity the capacity to set
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@ -52,10 +63,15 @@ public class InMemoryTraceRepository implements TraceRepository {
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Trace trace = new Trace(new Date(), map);
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synchronized (this.traces) {
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while (this.traces.size() >= this.capacity) {
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this.traces.remove(0);
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this.traces.remove(this.capacity - 1);
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}
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if (this.reverse) {
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this.traces.add(0, trace);
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}
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else {
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this.traces.add(trace);
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}
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}
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}
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}
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@ -40,7 +40,7 @@ public class InMemoryTraceRepositoryTests {
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this.repository.add(Collections.<String, Object> singletonMap("bar", "bar"));
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List<Trace> traces = this.repository.findAll();
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assertEquals(2, traces.size());
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assertEquals("bar", traces.get(1).getInfo().get("bar"));
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assertEquals("bar", traces.get(0).getInfo().get("bar"));
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}
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}
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