/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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.elasticsearch.index.translog;
import org.elasticsearch.ElasticsearchException;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;
import java.io.IOException;
import java.util.ArrayList;
public final class SnapshotMatchers {
private SnapshotMatchers() {
}
/**
* Consumes a snapshot and make sure it's size is as expected
*/
public static Matcher<Translog.Snapshot> size(int size) {
return new SizeMatcher(size);
}
/**
* Consumes a snapshot and make sure it's content is as expected
*/
public static Matcher<Translog.Snapshot> equalsTo(Translog.Operation... ops) {
return new EqualMatcher(ops);
}
/**
* Consumes a snapshot and make sure it's content is as expected
*/
public static Matcher<Translog.Snapshot> equalsTo(ArrayList<Translog.Operation> ops) {
return new EqualMatcher(ops.toArray(new Translog.Operation[ops.size()]));
}
public static class SizeMatcher extends TypeSafeMatcher<Translog.Snapshot> {
private final int size;
public SizeMatcher(int size) {
this.size = size;
}
@Override
public boolean matchesSafely(Translog.Snapshot snapshot) {
int count = 0;
try {
while (snapshot.next() != null) {
count++;
}
} catch (IOException ex) {
throw new ElasticsearchException("failed to advance snapshot", ex);
}
return size == count;
}
@Override
public void describeTo(Description description) {
description.appendText("a snapshot with size ").appendValue(size);
}
}
public static class EqualMatcher extends TypeSafeMatcher<Translog.Snapshot> {
private final Translog.Operation[] expectedOps;
String failureMsg = null;
public EqualMatcher(Translog.Operation[] expectedOps) {
this.expectedOps = expectedOps;
}
@Override
protected boolean matchesSafely(Translog.Snapshot snapshot) {
try {
Translog.Operation op;
int i;
for (i = 0, op = snapshot.next(); op != null && i < expectedOps.length; i++, op = snapshot.next()) {
if (expectedOps[i].equals(op) == false) {
failureMsg = "position [" + i + "] expected [" + expectedOps[i] + "] but found [" + op + "]";
return false;
}
}
if (i < expectedOps.length) {
failureMsg = "expected [" + expectedOps.length + "] ops but only found [" + i + "]";
return false;
}
if (op != null) {
int count = 1; // to account for the op we already read
while (snapshot.next() != null) {
count++;
}
failureMsg = "expected [" + expectedOps.length + "] ops but got [" + (expectedOps.length + count) + "]";
return false;
}
return true;
} catch (IOException ex) {
throw new ElasticsearchException("failed to read snapshot content", ex);
}
}
@Override
public void describeTo(Description description) {
description.appendText(failureMsg);
}
}
}