RemoteFlowManager.java

/*
 * Copyright © 2015 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.test.remote;

import co.cask.cdap.api.metrics.RuntimeMetrics;
import co.cask.cdap.client.MetricsClient;
import co.cask.cdap.client.ProgramClient;
import co.cask.cdap.client.config.ClientConfig;
import co.cask.cdap.client.util.RESTClient;
import co.cask.cdap.proto.Id;
import co.cask.cdap.test.AbstractProgramManager;
import co.cask.cdap.test.FlowManager;
import com.google.common.base.Preconditions;
import com.google.common.base.Throwables;

/**
 * Remote implementation of {@link FlowManager}.
 */
public class RemoteFlowManager extends AbstractProgramManager<FlowManager> implements FlowManager {

  private final ProgramClient programClient;
  private final MetricsClient metricsClient;
  private final Id.Flow flowId;

  public RemoteFlowManager(Id.Flow programId, ClientConfig clientConfig, RESTClient restClient,
                           RemoteApplicationManager applicationManager) {
    super(programId, applicationManager);
    this.flowId = programId;
    this.programClient = new ProgramClient(clientConfig, restClient);
    this.metricsClient = new MetricsClient(clientConfig, restClient);
  }

  @Override
  public void setFlowletInstances(String flowletName, int instances) {
    Preconditions.checkArgument(instances > 0, "Instance counter should be > 0.");
    try {
      programClient.setFlowletInstances(Id.Flow.Flowlet.from(flowId, flowletName), instances);
    } catch (Exception e) {
      throw Throwables.propagate(e);
    }
  }

  @Override
  public int getFlowletInstances(String flowletName) {
    try {
      return programClient.getFlowletInstances(Id.Flow.Flowlet.from(flowId, flowletName));
    } catch (Exception e) {
      throw Throwables.propagate(e);
    }
  }

  @Override
  public RuntimeMetrics getFlowletMetrics(String flowletId) {
    return metricsClient.getFlowletMetrics(programId, flowletId);
  }
}