// GPars - Groovy Parallel Systems
//
// Copyright © 2008-11 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
//
// 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 groovyx.gpars.benchmark.caliper.instrument;
import com.google.caliper.api.Benchmark;
import com.google.caliper.api.SkipThisScenarioException;
import com.google.caliper.runner.BenchmarkClass;
import com.google.caliper.runner.BenchmarkMethod;
import com.google.caliper.runner.Instrument;
import com.google.caliper.runner.InvalidBenchmarkException;
import com.google.caliper.runner.UserCodeException;
import com.google.caliper.util.ShortDuration;
import com.google.caliper.util.Util;
import com.google.caliper.worker.Worker;
import com.google.common.collect.ImmutableMap;
import groovyx.gpars.benchmark.caliper.worker.LatencyMeasurementWorker;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Throwables.propagateIfInstanceOf;
public class LatencyMeasurementInstrument extends Instrument {
@Override
public ShortDuration estimateRuntimePerTrial() {
return ShortDuration.valueOf(options.get("maxTotalRuntime"));
}
@Override
public boolean isBenchmarkMethod(final Method method) {
return method.getName().startsWith("latency") && Util.isPublic(method);
}
@Override
public BenchmarkMethod createBenchmarkMethod(final BenchmarkClass benchmarkClass, final Method method) throws InvalidBenchmarkException {
checkArgument(isBenchmarkMethod(method));
if (Util.isStatic(method)) {
throw new InvalidBenchmarkException(
"LatencyMeasure methods must not be static: " + method.getName());
}
final String methodName = method.getName();
final String shortName = methodName.substring("latency".length());
return new BenchmarkMethod(benchmarkClass, method, shortName);
}
@Override
public void dryRun(final Benchmark benchmark, final BenchmarkMethod benchmarkMethod)
throws UserCodeException {
final Method m = benchmarkMethod.method();
try {
m.invoke(benchmark, 1);
} catch (IllegalAccessException impossible) {
throw new AssertionError(impossible);
} catch (InvocationTargetException e) {
final Throwable userException = e.getCause();
propagateIfInstanceOf(userException, SkipThisScenarioException.class);
throw new UserCodeException(userException);
}
}
@Override
public Map<String, String> workerOptions() {
return new ImmutableMap.Builder<String, String>()
.put("warmupNanos", toNanosString("warmup"))
.put("timingIntervalNanos", toNanosString("timingInterval"))
.put("reportedIntervals", options.get("reportedIntervals"))
.put("shortCircuitTolerance", options.get("shortCircuitTolerance"))
.put("maxTotalRuntimeNanos", toNanosString("maxTotalRuntime"))
.put("gcBeforeEach", options.get("gcBeforeEach"))
.build();
}
@Override
public Class<? extends Worker> workerClass() {
return LatencyMeasurementWorker.class;
}
private String toNanosString(final String optionName) {
return String.valueOf(ShortDuration.valueOf(options.get(optionName)).to(TimeUnit.NANOSECONDS));
}
@Override
public boolean equals(final Object object) {
return object instanceof LatencyMeasurementInstrument;
}
@Override
public int hashCode() {
return 0x5FE89C3A;
}
@Override
public String toString() {
return "latency";
}
}