org.gradle.api.internal.tasks.compile.daemon.AbstractDaemonCompiler Maven / Gradle / Ivy

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/*
 * Copyright 2014 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 org.gradle.api.internal.tasks.compile.daemon;

import com.google.common.collect.Lists;
import org.gradle.api.tasks.WorkResult;
import org.gradle.api.tasks.compile.BaseForkOptions;
import org.gradle.internal.UncheckedException;
import org.gradle.language.base.internal.compile.CompileSpec;
import org.gradle.language.base.internal.compile.Compiler;
import org.gradle.workers.internal.DaemonForkOptions;
import org.gradle.workers.internal.DefaultWorkResult;
import org.gradle.workers.internal.SimpleActionExecutionSpec;
import org.gradle.workers.internal.Worker;
import org.gradle.workers.internal.WorkerFactory;

import javax.inject.Inject;
import java.io.File;
import java.util.Set;
import java.util.concurrent.Callable;

import static org.gradle.process.internal.util.MergeOptionsUtil.mergeHeapSize;
import static org.gradle.process.internal.util.MergeOptionsUtil.normalized;

public abstract class AbstractDaemonCompiler implements Compiler {
    private final Compiler delegate;
    private final WorkerFactory workerFactory;

    public AbstractDaemonCompiler(Compiler delegate, WorkerFactory workerFactory) {
        this.delegate = delegate;
        this.workerFactory = workerFactory;
    }

    public Compiler getDelegate() {
        return delegate;
    }

    @Override
    public WorkResult execute(T spec) {
        InvocationContext invocationContext = toInvocationContext(spec);
        DaemonForkOptions daemonForkOptions = invocationContext.getDaemonForkOptions();
        Worker worker = workerFactory.getWorker(daemonForkOptions);
        DefaultWorkResult result = worker.execute(new SimpleActionExecutionSpec(CompilerCallable.class, "compiler daemon", invocationContext.getInvocationWorkingDir(), new Object[] {delegate, spec}));
        if (result.isSuccess()) {
            return result;
        } else {
            throw UncheckedException.throwAsUncheckedException(result.getException());
        }
    }

    protected abstract InvocationContext toInvocationContext(T spec);

    protected BaseForkOptions mergeForkOptions(BaseForkOptions left, BaseForkOptions right) {
        BaseForkOptions merged = new BaseForkOptions();
        merged.setMemoryInitialSize(mergeHeapSize(left.getMemoryInitialSize(), right.getMemoryInitialSize()));
        merged.setMemoryMaximumSize(mergeHeapSize(left.getMemoryMaximumSize(), right.getMemoryMaximumSize()));
        Set mergedJvmArgs = normalized(left.getJvmArgs());
        mergedJvmArgs.addAll(normalized(right.getJvmArgs()));
        merged.setJvmArgs(Lists.newArrayList(mergedJvmArgs));
        return merged;
    }

    private static class CompilerCallable implements Callable {
        private final Compiler compiler;
        private final T compileSpec;

        @Inject
        public CompilerCallable(Compiler compiler, T compileSpec) {
            this.compiler = compiler;
            this.compileSpec = compileSpec;
        }

        @Override
        public WorkResult call() throws Exception {
            return compiler.execute(compileSpec);
        }
    }

    protected static class InvocationContext {
        private File invocationWorkingDir;
        private DaemonForkOptions daemonForkOptions;

        public InvocationContext(File invocationWorkingDir, DaemonForkOptions daemonForkOptions) {
            this.invocationWorkingDir = invocationWorkingDir;
            this.daemonForkOptions = daemonForkOptions;
        }

        File getInvocationWorkingDir() {
            return invocationWorkingDir;
        }

        DaemonForkOptions getDaemonForkOptions() {
            return daemonForkOptions;
        }

        public InvocationContext mergeWith(InvocationContext invocationContext) {
            if (!getInvocationWorkingDir().equals(invocationContext.getInvocationWorkingDir())) {
                throw new IllegalArgumentException("Cannot merge an InvocationContext with a different invocation working directory (this: " + getInvocationWorkingDir() + ", other: " + invocationContext.getInvocationWorkingDir() + ").");
            }

            DaemonForkOptions mergedForkOptions = getDaemonForkOptions().mergeWith(invocationContext.getDaemonForkOptions());
            return new InvocationContext(getInvocationWorkingDir(), mergedForkOptions);
        }
    }
}