Java DbxClient.getDelta方法代码示例

import com.dropbox.core.DbxClient; //导入方法依赖的package包/类
@Override
protected final void call(final DbxClient client, final ProgressMonitor pm) throws DbxException {
    pm.begin(1);
    final DbxDelta<DbxEntry> delta = client.getDelta(cursor);
    // we need to unroll this manually because of a NullPointerException when metadata is null
    getLog().info("reset=" + delta.reset);
    getLog().info("hasMore=" + delta.hasMore);
    getLog().info("cursor=\"" + delta.cursor + "\"");
    for (final Entry<DbxEntry> entry : delta.entries) {
        getLog().info("(lcPath=\"" + entry.lcPath + "\", metadata=" + entry.metadata + ")");
    }
}
 

import com.dropbox.core.DbxClient; //导入方法依赖的package包/类
/**
 * Synchronizes all changes from Dropbox to the local file system. Changes are
 * identified by the Dropbox delta mechanism which takes the <code>lastCursor</code>
 * field into account. If <code>lastCursor</code> is <code>null</code> it
 * tries to recreate it from the file <code>deltacursor.dbx</code>. If
 * it is still <code>null</code> all files are downloaded from the specified
 * location.
 * 
 * Note: Since we define Dropbox as data master we do not care about local
 * changes while downloading files!
 * 
 * @throws DbxException if there are technical or application level 
 * errors in the Dropbox communication
 * @throws IOException 
 */
public void syncDropboxToLocal(DbxClient client) throws DbxException, IOException {
	logger.debug("Started synchronization from Dropbox to local ...");
			
	lastCursor = readDeltaCursor();
	if (StringUtils.isBlank(lastCursor)) {
		logger.trace("Last cursor was NULL and has now been recreated from the filesystem '{}'", lastCursor);
	}

	DbxDelta<DbxEntry> deltaPage = client.getDelta(lastCursor);
	if (deltaPage.entries != null && deltaPage.entries.size() == 0) {
		logger.debug("There are no deltas to download from Dropbox ...");
	} else {
		do {
			logger.debug("There are '{}' deltas to process ...", deltaPage.entries.size());
			int processedDelta = 0;
			
			for (Entry<DbxEntry> entry : deltaPage.entries) {
				boolean matches = false;
				for (String filter : downloadFilterElements) {
					matches |= entry.lcPath.matches(filter);
				}
				
				if (matches) {
					if (entry.metadata != null) {
						downloadFile(client, entry);
					} else {
						String fqPath = contentDir + entry.lcPath;
						deleteLocalFile(fqPath);
					}
					processedDelta++;
				} else {
					logger.trace("skipped file '{}' since it doesn't match the given filter arguments.", entry.lcPath);
				}
			}
			logger.debug("'{}' deltas met the given downloadFilter {}", processedDelta, downloadFilterElements);
			
			// query again to check if there more entries to process!
			deltaPage = client.getDelta(lastCursor);
		} while (deltaPage.hasMore);
	}

	writeDeltaCursor(deltaPage.cursor);
}
 

import com.dropbox.core.DbxClient; //导入方法依赖的package包/类
/**
 * Synchronizes all changes from Dropbox to the local file system. Changes are
 * identified by the Dropbox delta mechanism which takes the <code>lastCursor</code>
 * field into account. If <code>lastCursor</code> is <code>null</code> it
 * tries to recreate it from the file <code>deltacursor.dbx</code>. If
 * it is still <code>null</code> all files are downloaded from the specified
 * location.
 *
 * Note: Since we define Dropbox as data master we do not care about local
 * changes while downloading files!
 *
 * @throws DbxException if there are technical or application level
 *             errors in the Dropbox communication
 * @throws IOException
 */
public void syncDropboxToLocal(DbxClient client) throws DbxException, IOException {
    logger.debug("Started synchronization from Dropbox to local ...");

    lastCursor = readDeltaCursor();
    if (StringUtils.isBlank(lastCursor)) {
        logger.trace("Last cursor was NULL and has now been recreated from the filesystem '{}'", lastCursor);
    }

    DbxDelta<DbxEntry> deltaPage = client.getDelta(lastCursor);
    if (deltaPage.entries != null && deltaPage.entries.size() == 0) {
        logger.debug("There are no deltas to download from Dropbox ...");
    } else {
        do {
            logger.debug("There are '{}' deltas to process ...", deltaPage.entries.size());
            int processedDelta = 0;

            for (Entry<DbxEntry> entry : deltaPage.entries) {
                boolean matches = false;
                for (String filter : downloadFilterElements) {
                    matches |= entry.lcPath.matches(filter);
                }

                if (matches) {
                    if (entry.metadata != null) {
                        downloadFile(client, entry);
                    } else {
                        String fqPath = contentDir + entry.lcPath;
                        deleteLocalFile(fqPath);
                    }
                    processedDelta++;
                } else {
                    logger.trace("skipped file '{}' since it doesn't match the given filter arguments.",
                            entry.lcPath);
                }
            }
            logger.debug("'{}' deltas met the given downloadFilter {}", processedDelta, downloadFilterElements);

            // query again to check if there more entries to process!
            deltaPage = client.getDelta(lastCursor);
        } while (deltaPage.hasMore);
    }

    writeDeltaCursor(deltaPage.cursor);
}