Android Open Source - Todo My Endpoint

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License

The source code is released under:

GNU General Public License

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Java Source Code

package voodsingular.todo;
//from w  ww  .j av  a 2  s .  c o  m

import com.google.api.server.spi.config.Api;
import com.google.api.server.spi.config.ApiMethod;
import com.google.api.server.spi.config.ApiNamespace;
import com.google.appengine.api.datastore.DatastoreService;
import com.google.appengine.api.datastore.DatastoreServiceFactory;
import com.google.appengine.api.datastore.Entity;
import com.google.appengine.api.datastore.FetchOptions;
import com.google.appengine.api.datastore.Key;
import com.google.appengine.api.datastore.KeyFactory;
import com.google.appengine.api.datastore.Query;
import com.google.appengine.api.datastore.Transaction;

import java.util.ArrayList;
import java.util.List;
/** An endpoint class we are exposing */
@Api (name = "taskApi", version = "v1",
      namespace = @ApiNamespace (ownerDomain = "todo.voodsingular", ownerName = "todo.voodsingular",
                                 packagePath = ""))
public class MyEndpoint {

  @ApiMethod(name = "storeTask")
  public void storeTask(TaskBean taskBean) {
    DatastoreService datastoreService = DatastoreServiceFactory.getDatastoreService();
    Transaction txn = datastoreService.beginTransaction();
    try {
      Key taskBeanParentKey = KeyFactory.createKey("TaskBeanParent", "todo.txt");
      Entity taskEntity = new Entity("TaskBean", taskBean.getId(), taskBeanParentKey);
      taskEntity.setProperty("data", taskBean.getData());
      datastoreService.put(taskEntity);
      txn.commit();
    } finally {
      if (txn.isActive()) {
        txn.rollback();
      }
    }
  }

  @ApiMethod(name = "getTasks")
  public List<TaskBean> getTasks() {
    DatastoreService datastoreService = DatastoreServiceFactory.getDatastoreService();
    Key taskBeanParentKey = KeyFactory.createKey("TaskBeanParent", "todo.txt");
    Query query = new Query(taskBeanParentKey);
    List<Entity> results = datastoreService.prepare(query).asList(FetchOptions.Builder.withDefaults());
    ArrayList<TaskBean> taskBeans = new ArrayList<TaskBean>();
    for (Entity result : results) {
      TaskBean taskBean = new TaskBean();
      taskBean.setId(result.getKey().getId());
      taskBean.setData((String) result.getProperty("data"));
      taskBeans.add(taskBean);
    }

    return taskBeans;
  }

  @ApiMethod(name = "clearTasks")
  public void clearTasks() {
    DatastoreService datastoreService = DatastoreServiceFactory.getDatastoreService();
    Transaction txn = datastoreService.beginTransaction();
    try {
      Key taskBeanParentKey = KeyFactory.createKey("TaskBeanParent", "todo.txt");
      Query query = new Query(taskBeanParentKey);
      List<Entity> results = datastoreService.prepare(query).asList(FetchOptions.Builder.withDefaults());
      for (Entity result : results) {
        datastoreService.delete(result.getKey());
      }
      txn.commit();
    } finally {
      if (txn.isActive()) {
        txn.rollback();
      }
    }
  }
}

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