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/*
* 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.indices.memory.breaker;
import org.elasticsearch.common.settings.ClusterSettings;
import org.elasticsearch.common.breaker.CircuitBreaker;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.indices.breaker.BreakerSettings;
import org.elasticsearch.indices.breaker.CircuitBreakerService;
import org.elasticsearch.indices.breaker.HierarchyCircuitBreakerService;
import org.elasticsearch.test.ESTestCase;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.instanceOf;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.notNullValue;
/**
* Unit tests for the circuit breaker
*/
public class CircuitBreakerUnitTests extends ESTestCase {
public static long pctBytes(String percentString) {
return Settings.EMPTY.getAsMemory("", percentString).bytes();
}
public void testBreakerSettingsValidationWithValidSettings() {
// parent: {:limit 70}, fd: {:limit 50}, request: {:limit 20}
BreakerSettings fd = new BreakerSettings(CircuitBreaker.FIELDDATA, pctBytes("50%"), 1.0);
BreakerSettings request = new BreakerSettings(CircuitBreaker.REQUEST, pctBytes("20%"), 1.0);
HierarchyCircuitBreakerService.validateSettings(new BreakerSettings[]{fd, request});
// parent: {:limit 70}, fd: {:limit 40}, request: {:limit 30}
fd = new BreakerSettings(CircuitBreaker.FIELDDATA, pctBytes("40%"), 1.0);
request = new BreakerSettings(CircuitBreaker.REQUEST, pctBytes("30%"), 1.0);
HierarchyCircuitBreakerService.validateSettings(new BreakerSettings[]{fd, request});
}
public void testBreakerSettingsValidationNegativeOverhead() {
// parent: {:limit 70}, fd: {:limit 50}, request: {:limit 20}
BreakerSettings fd = new BreakerSettings(CircuitBreaker.FIELDDATA, pctBytes("50%"), -0.1);
BreakerSettings request = new BreakerSettings(CircuitBreaker.REQUEST, pctBytes("20%"), 1.0);
try {
HierarchyCircuitBreakerService.validateSettings(new BreakerSettings[]{fd, request});
fail("settings are invalid but validate settings did not throw an exception");
} catch (Exception e) {
assertThat("Incorrect message: " + e.getMessage(),
e.getMessage().contains("must be non-negative"), equalTo(true));
}
}
public void testRegisterCustomBreaker() throws Exception {
CircuitBreakerService service = new HierarchyCircuitBreakerService(Settings.EMPTY, new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS));
String customName = "custom";
BreakerSettings settings = new BreakerSettings(customName, 20, 1.0);
service.registerBreaker(settings);
CircuitBreaker breaker = service.getBreaker(customName);
assertThat(breaker, notNullValue());
assertThat(breaker, instanceOf(CircuitBreaker.class));
assertThat(breaker.getName(), is(customName));
}
}
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