Java Objectify.find方法代碼示例

import com.googlecode.objectify.Objectify; //導入方法依賴的package包/類
private void addUserFileContents(Objectify datastore, String userId, String fileName, byte[] content) {
  UserFileData ufd = datastore.find(userFileKey(userKey(userId), fileName));
  byte [] empty = new byte[] { (byte)0x5b, (byte)0x5d }; // "[]" in bytes
  if (ufd == null) {          // File doesn't exist
    if (fileName.equals(StorageUtil.USER_BACKPACK_FILENAME) &&
      Arrays.equals(empty, content)) {
      return;                 // Nothing to do
    }
    ufd = new UserFileData();
    ufd.fileName = fileName;
    ufd.userKey = userKey(userId);
  } else {
    if (fileName.equals(StorageUtil.USER_BACKPACK_FILENAME) &&
      Arrays.equals(empty, content)) {
      // Storing an empty backback, just delete the file
      datastore.delete(userFileKey(userKey(userId), fileName));
      return;
    }
  }
  ufd.content = content;
  datastore.put(ufd);
}
 

import com.googlecode.objectify.Objectify; //導入方法依賴的package包/類
private FileData createProjectFile(Objectify datastore, Key<ProjectData> projectKey,
    FileData.RoleEnum role, String fileName) {
  FileData fd = datastore.find(projectFileKey(projectKey, fileName));
  if (fd == null) {
    fd = new FileData();
    fd.fileName = fileName;
    fd.projectKey = projectKey;
    fd.role = role;
    return fd;
  } else if (!fd.role.equals(role)) {
    throw CrashReport.createAndLogError(LOG, null,
        collectProjectErrorInfo(null, projectKey.getId(), fileName),
        new IllegalStateException("File role change is not supported"));
  }
  return null;
}
 

import com.googlecode.objectify.Objectify; //導入方法依賴的package包/類
private void removeFilesFromProject(Objectify datastore, long projectId,
    FileData.RoleEnum role, boolean changeModDate, String... fileNames) {
  Key<ProjectData> projectKey = projectKey(projectId);
  List<Key<FileData>> filesToRemove = new ArrayList<Key<FileData>>();
  for (String fileName : fileNames) {
    Key<FileData> key = projectFileKey(projectKey, fileName);
    memcache.delete(key.getString()); // Remove it from memcache (if it is there)
    FileData fd = datastore.find(key);
    if (fd != null) {
      if (fd.role.equals(role)) {
        filesToRemove.add(projectFileKey(projectKey, fileName));
      } else {
        throw CrashReport.createAndLogError(LOG, null,
            collectProjectErrorInfo(null, projectId, fileName),
            new IllegalStateException("File role change is not supported"));
      }
    }
  }
  datastore.delete(filesToRemove);  // batch delete
  if (changeModDate) {
    updateProjectModDate(datastore, projectId, false);
  }
}
 

import com.googlecode.objectify.Objectify; //導入方法依賴的package包/類
private long updateProjectModDate(Objectify datastore, long projectId, boolean doingConversion) {
  long modDate = System.currentTimeMillis();
  ProjectData pd = datastore.find(projectKey(projectId));
  if (pd != null) {
    // Only update the ProjectData dateModified if it is more then a minute
    // in the future. Do this to avoid unnecessary datastore puts.
    // Also do not update modification time when doing conversion from
    // blobstore to GCS
    if ((modDate > (pd.dateModified + 1000*60)) && !doingConversion) {
      pd.dateModified = modDate;
      datastore.put(pd);
    } else {
      // return the (old) dateModified
      modDate = pd.dateModified;
    }
    return modDate;
  } else {
    throw CrashReport.createAndLogError(LOG, null, null,
        new IllegalArgumentException("project " + projectId + " doesn't exist"));
  }
}
 

import com.googlecode.objectify.Objectify; //導入方法依賴的package包/類
/**
 * Returns a wrapped class which contains a list of featured gallery app
 * @param start start index
 * @param count count number
 * @return list of gallery app
 */
public GalleryAppListResult getFeaturedApp(int start, int count){
  final List<GalleryApp> apps = new ArrayList<GalleryApp>();
  Objectify datastore = ObjectifyService.begin();
  for (GalleryAppFeatureData appFeatureData:datastore.query(GalleryAppFeatureData.class).offset(start).limit(count)) {
    Long galleryId = appFeatureData.galleryKey.getId();
    GalleryApp gApp = new GalleryApp();
    GalleryAppData galleryAppData = datastore.find(galleryKey(galleryId));
    makeGalleryApp(galleryAppData, gApp);
    apps.add(gApp);
  }

  int totalCount = datastore.query(GalleryAppFeatureData.class).count();
  return new GalleryAppListResult(apps, totalCount);
}
 

import com.googlecode.objectify.Objectify; //導入方法依賴的package包/類
/**
 * Returns a wrapped class which contains a list of tutorial gallery app
 * @param start start index
 * @param count count number
 * @return list of gallery app
 */
public GalleryAppListResult getTutorialApp(int start, int count){
  final List<GalleryApp> apps = new ArrayList<GalleryApp>();
  Objectify datastore = ObjectifyService.begin();
  for (GalleryAppTutorialData appTutorialData:datastore.query(GalleryAppTutorialData.class).offset(start).limit(count)) {
    Long galleryId = appTutorialData.galleryKey.getId();
    GalleryApp gApp = new GalleryApp();
    GalleryAppData galleryAppData = datastore.find(galleryKey(galleryId));
    makeGalleryApp(galleryAppData, gApp);
    apps.add(gApp);
  }

  int totalCount = datastore.query(GalleryAppTutorialData.class).count();
  return new GalleryAppListResult(apps, totalCount);
}
 

import com.googlecode.objectify.Objectify; //導入方法依賴的package包/類
private UserFileData createUserFile(Objectify datastore, Key<UserData> userKey,
    String fileName) {
  UserFileData ufd = datastore.find(userFileKey(userKey, fileName));
  if (ufd == null) {
    ufd = new UserFileData();
    ufd.fileName = fileName;
    ufd.userKey = userKey;
    return ufd;
  }
  return null;
}
 

import com.googlecode.objectify.Objectify; //導入方法依賴的package包/類
@VisibleForTesting
boolean isGcsFile(long projectId, String fileName) {
  Objectify datastore = ObjectifyService.begin();
  Key<FileData> fileKey = projectFileKey(projectKey(projectId), fileName);
  FileData fd;
  fd = (FileData) memcache.get(fileKey.getString());
  if (fd == null) {
    fd = datastore.find(fileKey);
  }
  if (fd != null) {
    return isTrue(fd.isGCS);
  } else {
    return false;
  }
}
 

import com.googlecode.objectify.Objectify; //導入方法依賴的package包/類
public void checkUpgrade(String userId) {
  if (!conversionEnabled)     // Unless conversion is enabled...
    return;
  Objectify datastore = ObjectifyService.begin();
  UserData userData = datastore.find(userKey(userId));
  if ((userData.upgradedGCS && useGcs) ||
    (!userData.upgradedGCS && !useGcs))
    return;                   // All done.
  Queue queue = QueueFactory.getQueue("blobupgrade");
  queue.add(TaskOptions.Builder.withUrl("/convert").param("user", userId)
    .etaMillis(System.currentTimeMillis() + 60000));
  return;
}
 

import com.googlecode.objectify.Objectify; //導入方法依賴的package包/類
public void doUpgrade(String userId) {
  if (!conversionEnabled)     // Unless conversion is enabled...
    return;                   // shouldn't really ever happen but...
  Objectify datastore = ObjectifyService.begin();
  UserData userData = datastore.find(userKey(userId));
  if ((userData.upgradedGCS && useGcs) ||
    (!userData.upgradedGCS && !useGcs))
    return;                   // All done, another task did it!
  List<Long> projectIds = getProjects(userId);
  boolean anyFailed = false;
  for (long projectId : projectIds) {
    for (FileData fd : datastore.query(FileData.class).ancestor(projectKey(projectId))) {
      if (fd.isBlob) {
        if (useGcs) {         // Let's convert by just reading it!
          downloadRawFile(userId, projectId, fd.fileName);
        }
      } else if (isTrue(fd.isGCS)) {
        if (!useGcs) {        // Let's downgrade by just reading it!
          downloadRawFile(userId, projectId, fd.fileName);
        }
      }
    }
  }

  /*
   * If we are running low on time, we may have not moved all files
   * so exit now without marking the user as having been finished
   */
  if (ApiProxy.getCurrentEnvironment().getRemainingMillis() <= 5000)
    return;

  /* If anything failed, also return without marking user */
  if (anyFailed)
    return;

  datastore = ObjectifyService.beginTransaction();
  userData = datastore.find(userKey(userId));
  userData.upgradedGCS = useGcs;
  datastore.put(userData);
  datastore.getTxn().commit();
}