/*
 * Copyright 2011 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.launcher.daemon.server.exec;

import org.gradle.api.logging.Logger;
import org.gradle.api.logging.Logging;
import org.gradle.launcher.daemon.diagnostics.DaemonDiagnostics;
import org.gradle.launcher.daemon.protocol.Build;
import org.gradle.launcher.daemon.protocol.BuildStarted;
import org.gradle.launcher.daemon.protocol.DaemonBusy;

/**
 * Updates the daemon idle/busy status, sending a DaemonBusy result back to the client if the daemon is busy.
 */
public class StartBuildOrRespondWithBusy extends BuildCommandOnly {
    
    private static final Logger LOGGER = Logging.getLogger(StartBuildOrRespondWithBusy.class);
    private final DaemonDiagnostics diagnostics;

    public StartBuildOrRespondWithBusy(DaemonDiagnostics diagnostics) {
        this.diagnostics = diagnostics;
    }

    protected void doBuild(DaemonCommandExecution execution, Build build) {
        DaemonStateControl stateCoordinator = execution.getDaemonStateControl();

        DaemonCommandExecution existingExecution = stateCoordinator.onStartCommand(execution);
        if (existingExecution != null) {
            LOGGER.info("Daemon will not handle the request: {} because is busy executing: {}. Dispatching 'Busy' response...", build, existingExecution);
            execution.getConnection().dispatch(new DaemonBusy(existingExecution.getCommand()));
        } else {
            try {
                LOGGER.info("Daemon is about to start building: " + build + ". Dispatching build started information...");
                execution.getConnection().dispatch(new BuildStarted(diagnostics));
                execution.proceed();
            } finally {
                stateCoordinator.onFinishCommand();
            }
        }
    }
    
    

}