/*
* Copyright © 2016 Cask Data, 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 co.cask.cdap.app.guice;
import co.cask.cdap.app.runtime.ProgramRunner;
import co.cask.cdap.app.runtime.ProgramRunnerFactory;
import co.cask.cdap.app.runtime.ProgramRuntimeProvider;
import co.cask.cdap.internal.app.runtime.ProgramRuntimeProviderLoader;
import co.cask.cdap.proto.ProgramType;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Provider;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Map;
/**
* The default implementation of {@link ProgramRunnerFactory} used inside app-fabric.
*/
public final class DefaultProgramRunnerFactory implements ProgramRunnerFactory {
private static final Logger LOG = LoggerFactory.getLogger(DefaultProgramRunnerFactory.class);
private final Injector injector;
private final Map<ProgramType, Provider<ProgramRunner>> defaultRunnerProviders;
private final ProgramRuntimeProvider.Mode mode;
private final ProgramRuntimeProviderLoader runtimeProviderLoader;
@Inject
DefaultProgramRunnerFactory(Injector injector, ProgramRuntimeProvider.Mode mode,
ProgramRuntimeProviderLoader runtimeProviderLoader,
Map<ProgramType, Provider<ProgramRunner>> defaultRunnerProviders) {
this.injector = injector;
this.defaultRunnerProviders = defaultRunnerProviders;
this.mode = mode;
this.runtimeProviderLoader = runtimeProviderLoader;
}
@Override
public ProgramRunner create(ProgramType programType) {
ProgramRuntimeProvider provider = runtimeProviderLoader.get(programType);
if (provider != null) {
LOG.debug("Using runtime provider {} for program type {}", provider, programType);
return provider.createProgramRunner(programType, mode, injector);
}
Provider<ProgramRunner> defaultProvider = defaultRunnerProviders.get(programType);
if (defaultProvider == null) {
throw new IllegalArgumentException("Unsupported program type: " + programType);
}
return defaultProvider.get();
}
}