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/*******************************************************************************
* Copyright (c) 2006-2011 Gluster, Inc. <http://www.gluster.com>
* This file is part of Gluster Management Gateway.
*
* Gluster Management Gateway is free software; you can redistribute
* it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* Gluster Management Gateway is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*******************************************************************************/
package org.gluster.storage.management.gateway.resources.v1_0;
import static org.gluster.storage.management.core.constants.RESTConstants.FORM_PARAM_OPERATION;
import static org.gluster.storage.management.core.constants.RESTConstants.PATH_PARAM_CLUSTER_NAME;
import static org.gluster.storage.management.core.constants.RESTConstants.PATH_PARAM_TASK_ID;
import static org.gluster.storage.management.core.constants.RESTConstants.RESOURCE_PATH_CLUSTERS;
import static org.gluster.storage.management.core.constants.RESTConstants.RESOURCE_TASKS;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.ws.rs.DELETE;
import javax.ws.rs.FormParam;
import javax.ws.rs.GET;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import org.gluster.storage.management.core.constants.RESTConstants;
import org.gluster.storage.management.core.exceptions.GlusterRuntimeException;
import org.gluster.storage.management.core.exceptions.GlusterValidationException;
import org.gluster.storage.management.core.model.Status;
import org.gluster.storage.management.core.model.TaskInfo;
import org.gluster.storage.management.core.response.TaskInfoListResponse;
import org.gluster.storage.management.gateway.tasks.Task;
import org.springframework.stereotype.Component;
import com.sun.jersey.spi.resource.Singleton;
@Path(RESOURCE_PATH_CLUSTERS + "/{" + PATH_PARAM_CLUSTER_NAME + "}/" + RESOURCE_TASKS)
@Singleton
@Component
public class TasksResource extends AbstractResource {
private Map<String, Map<String, Task>> tasksMap = new HashMap<String, Map<String, Task>>();
public TasksResource() {
}
@SuppressWarnings({"unchecked", "rawtypes"})
public void addTask(String clusterName, Task task) {
Map clusterTaskMap = tasksMap.get(clusterName);
if(clusterTaskMap == null) {
clusterTaskMap = new HashMap<String, Task>();
tasksMap.put(clusterName, clusterTaskMap);
}
// Remove the task if already exist
if (clusterTaskMap.containsKey(task.getId())) {
removeTask(clusterName, task);
}
clusterTaskMap.put(task.getId(), task);
}
@SuppressWarnings("rawtypes")
public void removeTask(String clusterName, Task task) {
Map clusterTaskMap = tasksMap.get(clusterName);
if (clusterTaskMap != null) {
clusterTaskMap.remove(task.getId());
}
}
public List<TaskInfo> getAllTasksInfo(String clusterName) {
Map<String, Task> clusterTasksMap = tasksMap.get(clusterName);
List<TaskInfo> allTasksInfo = new ArrayList<TaskInfo>();
if ( clusterTasksMap == null) {
return allTasksInfo;
}
for (Map.Entry<String, Task> entry : clusterTasksMap.entrySet()) {
checkTaskStatus(clusterName, entry.getKey());
allTasksInfo.add(entry.getValue().getTaskInfo()); // TaskInfo with latest status
}
return allTasksInfo;
}
public Task getTask(String clusterName, String taskId) {
Map<String, Task> clusterTasksMap = tasksMap.get(clusterName);
for (Map.Entry<String, Task> entry : clusterTasksMap.entrySet()) {
if (entry.getValue().getId().equals(taskId)) {
return entry.getValue();
}
}
return null;
}
public List<Task> getAllTasks(String clusterName) {
Map<String, Task> clusterTasksMap = tasksMap.get(clusterName);
List<Task> tasks = new ArrayList<Task>();
for (Map.Entry<String, Task> entry : clusterTasksMap.entrySet()) {
checkTaskStatus(clusterName, entry.getKey());
tasks.add( (Task) entry.getValue());
}
return tasks;
}
@GET
@Produces(MediaType.APPLICATION_XML)
public Response getTasks(@PathParam(PATH_PARAM_CLUSTER_NAME) String clusterName) {
try {
return okResponse(new TaskInfoListResponse(getAllTasksInfo(clusterName)), MediaType.APPLICATION_XML);
} catch (GlusterRuntimeException e) {
return errorResponse(e.getMessage());
}
}
@GET
@Path("/{" + PATH_PARAM_TASK_ID + "}")
@Produces(MediaType.APPLICATION_XML)
public Response getTaskStatus(@PathParam(PATH_PARAM_CLUSTER_NAME) String clusterName,
@PathParam(PATH_PARAM_TASK_ID) String taskId) {
try {
Task task = checkTaskStatus(clusterName, taskId);
return okResponse(task.getTaskInfo(), MediaType.APPLICATION_XML);
} catch (GlusterRuntimeException e) {
return errorResponse(e.getMessage());
}
}
private Task checkTaskStatus(String clusterName, String taskId) {
Task task = getTask(clusterName, taskId);
// No status check required if the task already complete or failure
if (task.getTaskInfo().getStatus().getCode() == Status.STATUS_CODE_FAILURE
|| task.getTaskInfo().getStatus().getCode() == Status.STATUS_CODE_SUCCESS) {
return task;
}
task.getTaskInfo().setStatus(task.checkStatus());
return task;
}
@PUT
@Path("/{" + PATH_PARAM_TASK_ID + "}")
@Produces(MediaType.APPLICATION_XML)
public Response performTask(@PathParam(PATH_PARAM_CLUSTER_NAME) String clusterName,
@PathParam(PATH_PARAM_TASK_ID) String taskId, @FormParam(FORM_PARAM_OPERATION) String taskOperation) {
Task task = getTask(clusterName, taskId);
try {
if (taskOperation.equals(RESTConstants.TASK_RESUME)) {
task.resume();
} else if (taskOperation.equals(RESTConstants.TASK_PAUSE)) {
task.pause();
} else if (taskOperation.equals(RESTConstants.TASK_STOP)) {
// task.stop();
clearTask(clusterName, taskId, taskOperation); // Stop and remove from the task list
} else if (taskOperation.equals(RESTConstants.TASK_COMMIT)) {
task.commit();
}
return (Response) noContentResponse();
} catch(GlusterValidationException ve) {
return badRequestResponse(ve.getMessage());
} catch (GlusterRuntimeException e) {
return errorResponse(e.getMessage());
}
}
@DELETE
@Path("/{" + PATH_PARAM_TASK_ID + "}")
@Produces(MediaType.APPLICATION_XML)
public Response clearTask(@PathParam(PATH_PARAM_CLUSTER_NAME) String clusterName,
@PathParam(PATH_PARAM_TASK_ID) String taskId, @QueryParam(FORM_PARAM_OPERATION) String taskOperation) {
Task task = getTask(clusterName, taskId);
if (task == null) {
return notFoundResponse("Requested task not found!");
}
if(clusterName == null || clusterName.isEmpty()) {
return badRequestResponse("Parameter [" + PATH_PARAM_CLUSTER_NAME + "] is missing in request!");
}
if(taskOperation == null || taskOperation.isEmpty()) {
int taskStatus = task.getTaskInfo().getStatus().getCode();
if (taskStatus == Status.STATUS_CODE_SUCCESS || taskStatus == Status.STATUS_CODE_FAILURE
|| taskStatus == Status.STATUS_CODE_ERROR) {
taskOperation = RESTConstants.TASK_DELETE;
} else {
taskOperation = RESTConstants.TASK_STOP;
}
// return badRequestResponse("Parameter [" + FORM_PARAM_OPERATION + "] is missing in request!");
}
if(!taskOperation.equals(RESTConstants.TASK_STOP) && !taskOperation.equals(RESTConstants.TASK_DELETE)) {
return badRequestResponse("Invalid value [" + taskOperation + "] for parameter [" + FORM_PARAM_OPERATION
+ "]");
}
try {
if (taskOperation.equals(RESTConstants.TASK_STOP)) {
task.stop();
// On successful, intentionally stopped task can be removed from task list also
taskOperation = RESTConstants.TASK_DELETE;
}
if (taskOperation.equals(RESTConstants.TASK_DELETE)) {
removeTask(clusterName, task);
}
return noContentResponse();
} catch (Exception e) {
return errorResponse(e.getMessage());
}
}
}
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