本文整理汇总了Java中com.google.appengine.api.datastore.DatastoreService类的典型用法代码示例。如果您正苦于以下问题：Java DatastoreService类的具体用法？Java DatastoreService怎么用？Java DatastoreService使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
DatastoreService类属于com.google.appengine.api.datastore包，在下文中一共展示了DatastoreService类的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: doGet_repeatedPropertyEntities_writesWidgets
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
@SuppressWarnings("VariableDeclarationUsageDistance")
@Test
public void doGet_repeatedPropertyEntities_writesWidgets() throws Exception {
DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();
// [START exploding_index_example_3]
Entity widget = new Entity("Widget");
widget.setProperty("x", Arrays.asList(1, 2, 3, 4));
widget.setProperty("y", Arrays.asList("red", "green", "blue"));
widget.setProperty("date", new Date());
datastore.put(widget);
// [END exploding_index_example_3]
servletUnderTest.doGet(mockRequest, mockResponse);
assertThat(responseWriter.toString())
.named("IndexesServlet response")
.isEqualTo("Got 1 widgets.\n");
}
示例2: saveFile
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
/**
* Save Full File
*
* @param inputStream
*/
private static void saveFile(InputStream inputStream) {
DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("CET"));
time.set(Calendar.HOUR_OF_DAY,0);
time.set(Calendar.MINUTE,0);
time.set(Calendar.SECOND,0);
Date measuredAt = time.getTime();
long millis = time.getTimeInMillis();
//
Entity entity = new Entity(ENTITY_TYPE_FICHEROS,millis);
entity.setIndexedProperty("Date", measuredAt);
entity.setUnindexedProperty("File", GlobalUtils.getString(inputStream));
// Store
datastore.put(entity);
}
示例3: doGet
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
resp.setContentType("text/html");
resp.getWriter().println("<html><body>");
DatastoreService datastore = DatastoreServiceFactory
.getDatastoreService();
Query query = new Query("SharedList");
query.addSort(Entity.KEY_RESERVED_PROPERTY, SortDirection.ASCENDING);
List<Entity> results = datastore.prepare(query).asList(
FetchOptions.Builder.withDefaults());
for (Entity entity : results) {
String email = (String) entity.getProperty("email");
String productID = (String) entity.getKey().getName();
String productName = (String) entity.getProperty("productName");
Date sharedDate = (Date) entity.getProperty("sharedDate");
resp.getWriter().println(
email + " shared <a href=\"http://www.amazon.com/dp/"
+ productID + "\" target=\"_blank\">" + "<b>"
+ productName + "</b></a>!<br>");
}
resp.getWriter().println("</body></html>");
}
示例4: getEntitiesBrowser
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
@GET
@Produces(MediaType.TEXT_XML)
public List<SharedProduct> getEntitiesBrowser() {
List<SharedProduct> list = new ArrayList<SharedProduct>();
DatastoreService datastore = DatastoreServiceFactory
.getDatastoreService();
Query query = new Query("SharedList");
query.addSort(Entity.KEY_RESERVED_PROPERTY, SortDirection.ASCENDING);
List<Entity> results = datastore.prepare(query).asList(
FetchOptions.Builder.withDefaults());
for (Entity entity : results) {
String email = (String) entity.getProperty("email");
String productID = (String) entity.getKey().getName();
String productName = (String) entity.getProperty("productName");
Date sharedDate = (Date) entity.getProperty("sharedDate");
list.add(new SharedProduct(email, productID, productName,
sharedDate));
}
return list;
}
示例5: getEntities
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
@GET
@Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
public List<SharedProduct> getEntities() {
List<SharedProduct> list = new ArrayList<SharedProduct>();
DatastoreService datastore = DatastoreServiceFactory
.getDatastoreService();
Query query = new Query("SharedList");
query.addSort(Entity.KEY_RESERVED_PROPERTY, SortDirection.ASCENDING);
List<Entity> results = datastore.prepare(query).asList(
FetchOptions.Builder.withDefaults());
for (Entity entity : results) {
String email = (String) entity.getProperty("email");
String productID = (String) entity.getKey().getName();
String productName = (String) entity.getProperty("productName");
Date sharedDate = (Date) entity.getProperty("sharedDate");
list.add(new SharedProduct(email, productID, productName,
sharedDate));
}
return list;
}
示例6: newSharedProduct
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
@POST
@Produces(MediaType.TEXT_HTML)
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
public void newSharedProduct(@FormParam("productID") String productID,
@FormParam("productName") String productName,
@Context HttpServletResponse servletResponse) throws Exception {
UserService userService = UserServiceFactory.getUserService();
User user = userService.getCurrentUser();
if (user == null) {
System.out.println("Login first");
return;
}
DatastoreService datastore = DatastoreServiceFactory
.getDatastoreService();
Entity entity = new Entity("SharedList", productID);
entity.setProperty("email", user.getEmail());
entity.setProperty("productName", productName);
entity.setProperty("sharedDate", new Date());
datastore.put(entity);
servletResponse.getWriter().println(productName + " has been added.");
servletResponse.flushBuffer();
}
示例7: getHTML
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
@GET
@Produces(MediaType.TEXT_XML)
public WishlistProduct getHTML() {
DatastoreService datastore = DatastoreServiceFactory
.getDatastoreService();
try {
Key entKey = KeyFactory.createKey(email, productID);
Entity entity = datastore.get(entKey);
String productName = (String) entity.getProperty("productName");
double currentPrice = (double) entity.getProperty("currentPrice");
double lowestPrice = (double) entity.getProperty("lowestPrice");
Date lowestDate = (Date) entity.getProperty("lowestDate");
return new WishlistProduct(productID, productName, currentPrice,
lowestPrice, lowestDate);
} catch (EntityNotFoundException e) {
throw new RuntimeException("GET: Wishlist with " + productID
+ " not found.");
}
}
示例8: get
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
@GET
@Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
public WishlistProduct get() {
DatastoreService datastore = DatastoreServiceFactory
.getDatastoreService();
try {
Key entKey = KeyFactory.createKey(email, productID);
Entity entity = datastore.get(entKey);
String productName = (String) entity.getProperty("productName");
double currentPrice = (double) entity.getProperty("currentPrice");
double lowestPrice = (double) entity.getProperty("lowestPrice");
Date lowestDate = (Date) entity.getProperty("lowestDate");
return new WishlistProduct(productID, productName, currentPrice,
lowestPrice, lowestDate);
} catch (EntityNotFoundException e) {
throw new RuntimeException("GET: Wishlist with " + productID
+ " not found.");
}
}
示例9: MapreduceEntityCleanupAction
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
@Inject
MapreduceEntityCleanupAction(
@Parameter("jobId") Optional<String> jobId,
@Parameter("jobName") Optional<String> jobName,
@Parameter("numJobsToDelete") Optional<Integer> numJobsToDelete,
@Parameter("daysOld") Optional<Integer> daysOld,
@Parameter("force") Optional<Boolean> force,
MapreduceEntityCleanupUtil mapreduceEntityCleanupUtil,
Clock clock,
DatastoreService datastore,
Response response) {
this.jobId = jobId;
this.jobName = jobName;
this.numJobsToDelete = numJobsToDelete;
this.daysOld = daysOld;
this.force = force;
this.mapreduceEntityCleanupUtil = mapreduceEntityCleanupUtil;
this.clock = clock;
this.datastore = datastore;
this.response = response;
}
示例10: doPost
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
UserService userService = UserServiceFactory.getUserService();
User user = userService.getCurrentUser();
String guestbookName = req.getParameter("guestbookName");
Key guestbookKey = KeyFactory.createKey("Guestbook", guestbookName);
String content = req.getParameter("content");
Date date = new Date();
Entity greeting = new Entity("Greeting", guestbookKey);
if (user != null) {
greeting.setProperty("author_id", user.getUserId());
greeting.setProperty("author_email", user.getEmail());
}
greeting.setProperty("date", date);
greeting.setProperty("content", content);
DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();
datastore.put(greeting);
resp.sendRedirect("/guestbook.jsp?guestbookName=" + guestbookName);
}
示例11: map
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
@Override
public void map(Entity entity) {
System.out.println(entity);
Long lastModificationDate = (Long) entity.getProperty("lastModificationDate");
if (lastModificationDate == null) {
final DatastoreService dss = DatastoreServiceFactory.getDatastoreService();
entity.setProperty("lastModificationDate", System.currentTimeMillis());
dss.put(entity);
}
// incrementCounter("total entities", 1);
// incrementCounter("map calls in shard " + getContext().getShardNumber(), 1);
//
// String name = entity.getKey().getName();
// if (name != null) {
// incrementCounter("total entity key size", name.length());
// emitCharacterCounts(name);
// }
//
// Text property = (Text) entity.getProperty("payload");
// if (property != null) {
// incrementCounter("total entity payload size", property.getValue().length());
// emitCharacterCounts(property.getValue());
// }
}
示例12: readPolicy_strong_returnsAllResults
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
@Test
public void readPolicy_strong_returnsAllResults() {
double deadline = 5.0;
ReadPolicy policy = new ReadPolicy(ReadPolicy.Consistency.STRONG);
DatastoreServiceConfig datastoreConfig =
DatastoreServiceConfig.Builder.withReadPolicy(policy).deadline(deadline);
DatastoreService datastore = DatastoreServiceFactory.getDatastoreService(datastoreConfig);
Entity parent = new Entity("Person", "a");
Entity child = new Entity("Person", "b", parent.getKey());
datastore.put(ImmutableList.<Entity>of(parent, child));
Query q = new Query("Person").setAncestor(parent.getKey());
List<Entity> results = datastore.prepare(q).asList(FetchOptions.Builder.withDefaults());
assertThat(results).named("query results").hasSize(2);
}
示例13: printEntityGroupVersions
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
private static void printEntityGroupVersions(DatastoreService ds, PrintWriter writer) {
Entity entity1 = new Entity("Simple");
Key key1 = ds.put(entity1);
Key entityGroupKey = Entities.createEntityGroupKey(key1);
// Print entity1's entity group version
writer.println("version " + getEntityGroupVersion(ds, null, key1));
// Write to a different entity group
Entity entity2 = new Entity("Simple");
ds.put(entity2);
// Will print the same version, as entity1's entity group has not changed
writer.println("version " + getEntityGroupVersion(ds, null, key1));
// Change entity1's entity group by adding a new child entity
Entity entity3 = new Entity("Simple", entity1.getKey());
ds.put(entity3);
// Will print a higher version, as entity1's entity group has changed
writer.println("version " + getEntityGroupVersion(ds, null, key1));
}
示例14: doGet
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
Error error = Error.NONE;
String jsonEnd = HtmlVariable.AVAILABLE.getName();
String userId = req.getParameter(HtmlVariable.USER_ID.getName());
if(userId == null || userId.length() == 0) {
error = Error.REQUIRED_USER_ID;
jsonEnd = jsonEnd + "\": false }";
}
else {
DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();
User user = UserFactory.getByUserId(datastore, null, userId);
jsonEnd = (user != null) ? jsonEnd + "\": false }" : jsonEnd + "\": true }";
}
String jsonStart = "{ \"" + HtmlVariable.ERROR.getName() + "\": " + error.toString() + ", \"";
resp.setContentType("application/json; charset=UTF-8");
resp.getWriter().print(jsonStart + jsonEnd);
}
示例15: propertiesOfKind
import com.google.appengine.api.datastore.DatastoreService; //导入依赖的package包/类
List<String> propertiesOfKind(DatastoreService ds, String kind) {
// Start with unrestricted keys-only property query
Query q = new Query(Entities.PROPERTY_METADATA_KIND).setKeysOnly();
// Limit to specified kind
q.setAncestor(Entities.createKindKey(kind));
// Initialize result list
ArrayList<String> results = new ArrayList<String>();
//Build list of query results
for (Entity e : ds.prepare(q).asIterable()) {
results.add(e.getKey().getName());
}
// Return result list
return results;
}