| /* |
| * Copyright (C) 2010 Google Inc. |
| * |
| * 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 com.google.caliper; |
| |
| import com.google.caliper.UserException.ExceptionFromUserCodeException; |
| import com.google.common.base.Supplier; |
| |
| import java.io.OutputStream; |
| import java.io.PrintStream; |
| import java.util.List; |
| |
| /** |
| * Executes a benchmark in the current VM. |
| */ |
| final class InProcessRunner { |
| |
| public void run(String... args) { |
| Arguments arguments = Arguments.parse(args); |
| |
| ScenarioSelection scenarioSelection = new ScenarioSelection(arguments); |
| |
| try { |
| Measurer measurer = getMeasurer(arguments); |
| List<Scenario> scenarios = scenarioSelection.select(); |
| // We only expect one scenario right now - if we have more, something has gone wrong. |
| // This matters for things like reading the measurements. This is only done once, so if |
| // multiple scenarios are executed, they will be ignored! |
| if (scenarios.size() != 1) { |
| throw new IllegalArgumentException("Invalid arguments to subprocess. Expected exactly one " |
| + "scenario but got " + scenarios.size()); |
| } |
| Scenario scenario = scenarios.get(0); |
| |
| System.out.println("starting " + scenario); |
| MeasurementSet measurementSet = run(scenarioSelection, scenario, measurer); |
| System.out.println(arguments.getMarker() + Json.measurementSetToJson(measurementSet)); |
| } catch (UserException e) { |
| throw e; |
| } catch (Exception e) { |
| throw new ExceptionFromUserCodeException(e); |
| } |
| } |
| |
| public MeasurementSet run(final ScenarioSelection scenarioSelection, final Scenario scenario, |
| Measurer measurer) throws Exception { |
| Supplier<ConfiguredBenchmark> supplier = new Supplier<ConfiguredBenchmark>() { |
| @Override public ConfiguredBenchmark get() { |
| return scenarioSelection.createBenchmark(scenario); |
| } |
| }; |
| |
| PrintStream out = System.out; |
| PrintStream err = System.err; |
| measurer.setLogStream(out); |
| CountingPrintStream countedOut = new CountingPrintStream(out); |
| CountingPrintStream countedErr = new CountingPrintStream(err); |
| System.setOut(countedOut); |
| System.setErr(countedErr); |
| try { |
| MeasurementSet measurementSet = measurer.run(supplier); |
| if (measurementSet != null) { |
| measurementSet = measurementSet.plusCharCounts( |
| countedOut.getCount(), countedErr.getCount()); |
| } |
| return measurementSet; |
| } finally { |
| System.setOut(out); |
| System.setErr(err); |
| } |
| } |
| |
| private Measurer getMeasurer(Arguments arguments) { |
| if (arguments.getMeasurementType() == MeasurementType.TIME) { |
| return new TimeMeasurer(arguments.getWarmupMillis(), arguments.getRunMillis()); |
| } else if (arguments.getMeasurementType() == MeasurementType.INSTANCE) { |
| return new InstancesAllocationMeasurer(); |
| } else if (arguments.getMeasurementType() == MeasurementType.MEMORY) { |
| return new MemoryAllocationMeasurer(); |
| } else if (arguments.getMeasurementType() == MeasurementType.DEBUG) { |
| return new DebugMeasurer(arguments.getDebugReps()); |
| } else { |
| throw new IllegalArgumentException("unrecognized measurement type: " |
| + arguments.getMeasurementType()); |
| } |
| } |
| |
| public static void main(String... args) throws Exception { |
| try { |
| new InProcessRunner().run(args); |
| System.exit(0); // user code may have leave non-daemon threads behind! |
| } catch (UserException e) { |
| e.display(); // TODO: send this to the host process |
| System.out.println(LogConstants.CALIPER_LOG_PREFIX + LogConstants.SCENARIOS_FINISHED); |
| System.exit(1); |
| } |
| } |
| |
| public PrintStream nullPrintStream() { |
| return new PrintStream(new OutputStream() { |
| public void write(int b) {} |
| }); |
| } |
| } |