Android ownerName=“backend.company.com”,packagePath=“”)) 公共类AppVersionEndpoint{ @ApiMethod(name=“listAppVersion”) 公共集合响应listAppVersion(){ 列表执行; execute=ofy().load().type(AppVersion.class).list(); 返回CollectionResponse.builder().setItems(execute.build(); } /** *此方法获取具有主键id的实体。它使用HTTP GET方法。 * *@param id是java bean的主键。 *@返回主键id为的实体(如果为DNE,则为null)。 */ @ApiMethod(name=“getAppVersion”) 公共AppVersion getAppVersion(@Named(“id”)字符串id){ 返回y().load().type(AppVersion.class).id(id).now(); } /** *这将在App Engine数据存储中插入一个新实体。如果该实体已存在 *如果数据存储中存在,将引发异常。 *它使用HTTPPOST方法。 * *@param appversion要插入的实体。 *@返回插入的实体。 */ @ApiMethod(name=“insertAppVersion”) 公共AppVersion insertAppVersion(AppVersion AppVersion){ AppVersion exist=getAppVersion(AppVersion.getApplicationName()); 应用版本结果; if(exist==null){ ofy().save().entity(appversion.now(); 结果=getAppVersion(appversion.getApplicationName()); }否则{ 抛出新的IllegalArgumentException(appversion.getApplicationName()+“已存在”); } 返回结果; } }
我更希望它像最初一样可以过滤,但我不知道为什么它会有所不同。有人能告诉我吗?这里有两件事:首先,默认情况下,Objectify假设您不想为类的属性编制索引(这使您的数据存储索引保持精简和平均)。其次,我相信新的数据存储控制台的filter UI只显示具有与其相关联的索引的属性(因为您不能对未索引的属性进行筛选) 因此,如果您希望能够按minVersionRequired进行查询或排序,只需在POJO中的该字段中添加一个Android ownerName=“backend.company.com”,packagePath=“”)) 公共类AppVersionEndpoint{ @ApiMethod(name=“listAppVersion”) 公共集合响应listAppVersion(){ 列表执行; execute=ofy().load().type(AppVersion.class).list(); 返回CollectionResponse.builder().setItems(execute.build(); } /** *此方法获取具有主键id的实体。它使用HTTP GET方法。 * *@param id是java bean的主键。 *@返回主键id为的实体(如果为DNE,则为null)。 */ @ApiMethod(name=“getAppVersion”) 公共AppVersion getAppVersion(@Named(“id”)字符串id){ 返回y().load().type(AppVersion.class).id(id).now(); } /** *这将在App Engine数据存储中插入一个新实体。如果该实体已存在 *如果数据存储中存在,将引发异常。 *它使用HTTPPOST方法。 * *@param appversion要插入的实体。 *@返回插入的实体。 */ @ApiMethod(name=“insertAppVersion”) 公共AppVersion insertAppVersion(AppVersion AppVersion){ AppVersion exist=getAppVersion(AppVersion.getApplicationName()); 应用版本结果; if(exist==null){ ofy().save().entity(appversion.now(); 结果=getAppVersion(appversion.getApplicationName()); }否则{ 抛出新的IllegalArgumentException(appversion.getApplicationName()+“已存在”); } 返回结果; } },android,google-app-engine,google-cloud-datastore,Android,Google App Engine,Google Cloud Datastore,我更希望它像最初一样可以过滤,但我不知道为什么它会有所不同。有人能告诉我吗?这里有两件事:首先,默认情况下,Objectify假设您不想为类的属性编制索引(这使您的数据存储索引保持精简和平均)。其次,我相信新的数据存储控制台的filter UI只显示具有与其相关联的索引的属性(因为您不能对未索引的属性进行筛选) 因此,如果您希望能够按minVersionRequired进行查询或排序,只需在POJO中的该字段中添加一个@Index注释,Objectify将在底层数据存储API的底层实体类中使用s
@Index
注释,Objectify将在底层数据存储API的底层实体类中使用setIndexedProperty()
方法
如果您想在默认情况下索引类中的所有属性,可以在类上放置
@index
注释,然后@Unindex
任何您特别不想索引的属性。似乎不起作用。也许需要一些时间?我不需要重新添加所有的实体,对吗?嘿,你知道什么…我回来检查了几个小时后,更改生效了。谢谢
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public class AppVersion {
@Id
private String applicationName;
private int minVersionRequired;
public String getApplicationName() {
return applicationName;
}
public int getMinVersionRequired() {
return minVersionRequired;
}
public void setApplicationName(String applicationName) {
this.applicationName = applicationName;
}
public void setminVersionRequired(int minVersionRequired) {
this.minVersionRequired = minVersionRequired;
}
}
import com.googlecode.objectify.annotation.Entity;
import com.googlecode.objectify.annotation.Id;
@Entity
public class AppVersion {
@Id
private String applicationName;
private int minVersionRequired;
public String getApplicationName() {
return applicationName;
}
public int getMinVersionRequired() {
return minVersionRequired;
}
public void setApplicationName(String applicationName) {
this.applicationName = applicationName;
}
public void setminVersionRequired(int minVersionRequired) {
this.minVersionRequired = minVersionRequired;
}
}
import com.companionfree.zooperthemeviewer.EMF;
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.api.server.spi.response.CollectionResponse;
import com.google.appengine.api.datastore.Cursor;
import com.google.appengine.datanucleus.query.JPACursorHelper;
import java.util.List;
import javax.annotation.Nullable;
import javax.inject.Named;
import javax.persistence.EntityExistsException;
import javax.persistence.EntityNotFoundException;
import javax.persistence.EntityManager;
import javax.persistence.Query;
@Api(name = "appversionendpoint", namespace = @ApiNamespace(ownerDomain = "company.com", ownerName = "company.com", packagePath = "app"))
public class AppVersionEndpoint {
/**
* This method lists all the entities inserted in datastore.
* It uses HTTP GET method and paging support.
*
* @return A CollectionResponse class containing the list of all entities
* persisted and a cursor to the next page.
*/
@SuppressWarnings({ "unchecked", "unused" })
@ApiMethod(name = "listAppVersion")
public CollectionResponse<AppVersion> listAppVersion(
@Nullable @Named("cursor") String cursorString,
@Nullable @Named("limit") Integer limit) {
EntityManager mgr = null;
Cursor cursor = null;
List<AppVersion> execute = null;
try {
mgr = getEntityManager();
Query query = mgr
.createQuery("select from AppVersion as AppVersion");
if (cursorString != null && cursorString != "") {
cursor = Cursor.fromWebSafeString(cursorString);
query.setHint(JPACursorHelper.CURSOR_HINT, cursor);
}
if (limit != null) {
query.setFirstResult(0);
query.setMaxResults(limit);
}
execute = (List<AppVersion>) query.getResultList();
cursor = JPACursorHelper.getCursor(execute);
if (cursor != null)
cursorString = cursor.toWebSafeString();
// Tight loop for fetching all entities from datastore and accomodate
// for lazy fetch.
for (AppVersion obj : execute)
;
} finally {
mgr.close();
}
return CollectionResponse.<AppVersion> builder().setItems(execute)
.setNextPageToken(cursorString).build();
}
/**
* This method gets the entity having primary key id. It uses HTTP GET method.
*
* @param id the primary key of the java bean.
* @return The entity with primary key id.
*/
@ApiMethod(name = "getAppVersion")
public AppVersion getAppVersion(@Named("id") String id) {
EntityManager mgr = getEntityManager();
AppVersion appversion = null;
try {
appversion = mgr.find(AppVersion.class, id);
} finally {
mgr.close();
}
return appversion;
}
/**
* This inserts a new entity into App Engine datastore. If the entity already
* exists in the datastore, an exception is thrown.
* It uses HTTP POST method.
*
* @param appversion the entity to be inserted.
* @return The inserted entity.
*/
@ApiMethod(name = "insertAppVersion")
public AppVersion insertAppVersion(AppVersion appversion) {
EntityManager mgr = getEntityManager();
try {
if (containsAppVersion(appversion)) {
throw new EntityExistsException("Object already exists");
}
mgr.persist(appversion);
} finally {
mgr.close();
}
return appversion;
}
/**
* This method is used for updating an existing entity. If the entity does not
* exist in the datastore, an exception is thrown.
* It uses HTTP PUT method.
*
* @param appversion the entity to be updated.
* @return The updated entity.
*/
@ApiMethod(name = "updateAppVersion")
public AppVersion updateAppVersion(AppVersion appversion) {
EntityManager mgr = getEntityManager();
try {
if (!containsAppVersion(appversion)) {
throw new EntityNotFoundException("Object does not exist");
}
mgr.persist(appversion);
} finally {
mgr.close();
}
return appversion;
}
/**
* This method removes the entity with primary key id.
* It uses HTTP DELETE method.
*
* @param id the primary key of the entity to be deleted.
*/
@ApiMethod(name = "removeAppVersion")
public void removeAppVersion(@Named("id") String id) {
EntityManager mgr = getEntityManager();
try {
AppVersion appversion = mgr.find(AppVersion.class, id);
mgr.remove(appversion);
} finally {
mgr.close();
}
}
private boolean containsAppVersion(AppVersion appversion) {
EntityManager mgr = getEntityManager();
boolean contains = true;
try {
AppVersion item = mgr.find(AppVersion.class,
appversion.getApplicationName());
if (item == null) {
contains = false;
}
} finally {
mgr.close();
}
return contains;
}
private static EntityManager getEntityManager() {
return EMF.get().createEntityManager();
}
}
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.api.server.spi.response.CollectionResponse;
import java.util.List;
import javax.inject.Named;
import static com.company.backend.OfyService.ofy;
@Api(name = "appversionendpoint", version = "v1", namespace =
@ApiNamespace(ownerDomain = "backend.company.com",
ownerName = "backend.company.com", packagePath = ""))
public class AppVersionEndpoint {
@ApiMethod(name = "listAppVersion")
public CollectionResponse<AppVersion> listAppVersion() {
List<AppVersion> execute;
execute = ofy().load().type(AppVersion.class).list();
return CollectionResponse.<AppVersion> builder().setItems(execute).build();
}
/**
* This method gets the entity having primary key id. It uses HTTP GET method.
*
* @param id the primary key of the java bean.
* @return The entity with primary key id (null if DNE).
*/
@ApiMethod(name = "getAppVersion")
public AppVersion getAppVersion(@Named("id") String id) {
return ofy().load().type(AppVersion.class).id(id).now();
}
/**
* This inserts a new entity into App Engine datastore. If the entity already
* exists in the datastore, an exception is thrown.
* It uses HTTP POST method.
*
* @param appversion the entity to be inserted.
* @return The inserted entity.
*/
@ApiMethod(name = "insertAppVersion")
public AppVersion insertAppVersion(AppVersion appversion) {
AppVersion exist = getAppVersion(appversion.getApplicationName());
AppVersion result;
if (exist == null) {
ofy().save().entity(appversion).now();
result = getAppVersion(appversion.getApplicationName());
} else {
throw new IllegalArgumentException(appversion.getApplicationName() + " exists already");
}
return result;
}
}