/*
* Copyright © 2014 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.internal.app.runtime.workflow;
import co.cask.cdap.api.workflow.WorkflowActionNode;
import co.cask.cdap.api.workflow.WorkflowActionSpecification;
import co.cask.cdap.proto.codec.WorkflowActionSpecificationCodec;
import co.cask.http.AbstractHttpHandler;
import co.cask.http.HttpResponder;
import com.google.common.base.Supplier;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.reflect.TypeToken;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import java.lang.reflect.Type;
import java.util.List;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
/**
* A HttpHandler for handling Workflow REST API.
*/
public final class WorkflowServiceHandler extends AbstractHttpHandler {
private static final Gson GSON = new GsonBuilder()
.registerTypeAdapter(WorkflowActionSpecification.class,
new WorkflowActionSpecificationCodec())
.create();
private final Supplier<List<WorkflowActionNode>> statusSupplier;
WorkflowServiceHandler(Supplier<List<WorkflowActionNode>> statusSupplier) {
this.statusSupplier = statusSupplier;
}
/**
* Provides response to {@code /status} call to gives the latest status of this workflow.
*/
@GET
@Path("/status")
public void handleStatus(HttpRequest request, HttpResponder responder) {
Type type = new TypeToken<List<WorkflowActionNode>>() { }.getType();
responder.sendJson(HttpResponseStatus.OK, statusSupplier.get(), type, GSON);
}
}