Java Environment.getDatabaseNames方法代碼示例

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
@SuppressWarnings("unchecked")
public UpdateGroundhogScript(File datadir) throws DatabaseException {
  environmentConfig = new EnvironmentConfig();
  environmentConfig.setAllowCreate(true);
  environmentConfig.setTransactional(true);
  environmentConfig.setCacheSize(302400000);

  // perform other environment configurations

  environment = new Environment(datadir, environmentConfig);
  List<String> names = environment.getDatabaseNames();
  if (names.contains(datadir.getName())) {
    environment.renameDatabase(null, datadir.getName(), databaseName);
  }
  environment.close();
}
 

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
/**
 * Asserts than a database expectExists or does not exist. If keyName is
 * null, checks an entity database.  If keyName is non-null, checks a
 * secondary database.
 */
static void assertDbExists(boolean expectExists,
                           Environment env,
                           String storeName,
                           String entityClassName,
                           String keyName) {
    String dbName = "persist#" + storeName + '#' + entityClassName;
    if (keyName != null) {
        dbName += "#" + keyName;
    }
    List allDbNames;
    try {
        allDbNames = env.getDatabaseNames();
    } catch (DatabaseException e) {
        throw new RuntimeException(e);
    }
    if (expectExists != allDbNames.contains(dbName)) {
        TestCase.fail
            ((expectExists ? "Does not exist: " : "Does exist: ") +
             dbName);
    }
}
 

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
public UpdataIntegerSetStoreScript(File datadir) throws DatabaseException {
  environmentConfig = new EnvironmentConfig();
  environmentConfig.setAllowCreate(true);
  environmentConfig.setTransactional(true);
  environmentConfig.setCacheSize(302400000);

  // perform other environment configurations

  environment = new Environment(datadir, environmentConfig);
  List<String> names = environment.getDatabaseNames();
  if (names.contains(datadir.getName())) {
    environment.renameDatabase(null, datadir.getName(), databaseName);
  }
  environment.close();
}
 

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
public static Set<String> getStoreNames(Environment env)
    throws DatabaseException {

    Set<String> set = new HashSet<String>();
    for (Object o : env.getDatabaseNames()) {
        String s = (String) o;
        if (s.startsWith(NAME_PREFIX)) {
            int start = NAME_PREFIX.length();
            int end = s.indexOf(NAME_SEPARATOR, start);
            set.add(s.substring(start, end));
        }
    }
    return set;
}
 

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
/**
 * Invoke an operation for the given environment.
 *
 * @param targetEnv The target JE environment. May be null if the
 * environment is not open.
 * @param actionName operation name.
 * @param params operation parameters. May be null.
 * @param signature operation signature. May be null.
 * @return the operation result
 */
public Object invoke(Environment targetEnv,
                     String actionName,
                     Object [] params,
                     String [] signature)
    throws MBeanException {

    /* Sanity checking. */
    if (actionName == null) {
        throw new IllegalArgumentException("actionName cannot be null");
    }

    try {
        if (targetEnv != null) {
            if (actionName.equals(OP_CLEAN)) {
                int numFiles = targetEnv.cleanLog();
                return new Integer(numFiles);
            } else if (actionName.equals(OP_EVICT)) {
                targetEnv.evictMemory();
                return null;
            } else if (actionName.equals(OP_CHECKPOINT)) {
                CheckpointConfig config = new CheckpointConfig();
                if ((params != null) && (params.length > 0)) {
                    Boolean force = (Boolean) params[0];
                    config.setForce(force.booleanValue());
                }
                targetEnv.checkpoint(config);
                return null;
            } else if (actionName.equals(OP_SYNC)) {
                targetEnv.sync();
                return null;
            } else if (actionName.equals(OP_ENV_STAT)) {
                return targetEnv.getStats(getStatsConfig(params));
            } else if (actionName.equals(OP_LOCK_STAT)) {
                return targetEnv.getLockStats(getStatsConfig(params));
            } else if (actionName.equals(OP_TXN_STAT)) {
                return targetEnv.getTransactionStats(
                                                   getStatsConfig(params));
            } else if (actionName.equals(OP_DB_NAMES)) {
                return targetEnv.getDatabaseNames();
            } else if (actionName.equals(OP_DB_STAT)) {
                return getDatabaseStats(targetEnv, params);
            }
        }

        return new IllegalArgumentException("actionName: " +
                                            actionName +
                                            " is not valid");
    } catch (DatabaseException e) {
        /*
         * Add both the message and the exception for easiest
         * deciphering of the problem. Sometimes the original exception
         * stacktrace gets hidden in server logs.
         */
        throw new MBeanException(e, e.getMessage());
    }
}
 

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
/**
 * Invoke an operation for the given environment.
 * 
 * @param targetEnv The target JE environment. May be null if the
 * environment is not open.
 * @param actionName operation name.
 * @param params operation parameters. May be null.
 * @param signature operation signature. May be null.
 * @return the operation result
 */
public Object invoke(Environment targetEnv,
                     String actionName,
                     Object [] params,
                     String [] signature) 
    throws MBeanException {

    /* Sanity checking. */
    if (actionName == null) {
        throw new IllegalArgumentException("actionName cannot be null");
    }

    try {
        if (targetEnv != null) {
            if (actionName.equals(OP_CLEAN)) {
                int numFiles = targetEnv.cleanLog();
                return new Integer(numFiles);
            } else if (actionName.equals(OP_EVICT)) {
                targetEnv.evictMemory();
                return null;
            } else if (actionName.equals(OP_CHECKPOINT)) {
                CheckpointConfig config = new CheckpointConfig();
                if ((params != null) && (params.length > 0)) {
                    Boolean force = (Boolean) params[0];
                    config.setForce(force.booleanValue());
                }
                targetEnv.checkpoint(config);
                return null;
            } else if (actionName.equals(OP_SYNC)) {
                targetEnv.sync();
                return null;
            } else if (actionName.equals(OP_ENV_STAT)) {
                return targetEnv.getStats(getStatsConfig(params));
            } else if (actionName.equals(OP_LOCK_STAT)) {
                return targetEnv.getLockStats(getStatsConfig(params));
            } else if (actionName.equals(OP_TXN_STAT)) {
                return targetEnv.getTransactionStats(
                                                   getStatsConfig(params));
            } else if (actionName.equals(OP_DB_NAMES)) {
                return targetEnv.getDatabaseNames();
            } else if (actionName.equals(OP_DB_STAT)) {
                return getDatabaseStats(targetEnv, params);
            }
        } 

        return new IllegalArgumentException("actionName: " +
                                            actionName +
                                            " is not valid");
    } catch (DatabaseException e) {
        /* 
         * Add both the message and the exception for easiest
         * deciphering of the problem. Sometimes the original exception
         * stacktrace gets hidden in server logs.
         */
        throw new MBeanException(e, e.getMessage());
    }
}
 

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
public CrawlController(CrawlConfig config, PageFetcher pageFetcher, RobotsTxtServer robotstxtServer)
        throws Exception {
    super(config);

    config.validate();
    File folder = new File(config.crawlStorageFolder());
    if (!folder.exists()) {
        if (!folder.mkdirs()) {
            throw new Exception("Couldn't create this folder: " + folder.getAbsolutePath());
        }
    }

    boolean resumable = config.resumableCrawling();

    EnvironmentConfig envConfig = new EnvironmentConfig();
    envConfig.setAllowCreate(true);
    envConfig.setTransactional(resumable);
    envConfig.setLocking(resumable);

    File envHome = new File(config.crawlStorageFolder() + "/frontier");
    if (!envHome.exists()) {
        if (!envHome.mkdir()) {
            throw new Exception("Couldn't create this folder: " + envHome.getAbsolutePath());
        }
    }


    Environment env = new Environment(envHome, envConfig);

    if (!resumable) {
        List<String> names = env.getDatabaseNames();
        for (String name : names) {
            long count = env.truncateDatabase(null, name, true);
            logger.info(count + " items deleted from database " + name);
        }
        //env.removeDatabase(null, "DocIDs");
        //IO.deleteFolderContents(envHome);
    }

    docIdServer = new DocIDServer(env, config);
    frontier = new Frontier(env, config, docIdServer);

    this.pageFetcher = pageFetcher;
    this.robotstxtServer = robotstxtServer;

    finished = false;
    shuttingDown = false;
}
 

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
/**
 * Invoke an operation for the given environment.
 *
 * @param targetEnv The target JE environment. May be null if the
 * environment is not open.
 * @param actionName operation name.
 * @param params operation parameters. May be null.
 * @param signature operation signature. May be null.
 * @return the operation result
 */
public Object invoke(Environment targetEnv,
                     String actionName,
                     Object[] params,
                     String[] signature)
    throws MBeanException {

    /* Sanity checking. */
    if (actionName == null) {
        throw new IllegalArgumentException("actionName cannot be null");
    }

    try {
        if (targetEnv != null) {
            if (actionName.equals(OP_CLEAN)) {
                int numFiles = targetEnv.cleanLog();
                return new Integer(numFiles);
            } else if (actionName.equals(OP_EVICT)) {
                targetEnv.evictMemory();
                return null;
            } else if (actionName.equals(OP_CHECKPOINT)) {
                CheckpointConfig config = new CheckpointConfig();
                if ((params != null) && (params.length > 0)) {
                    Boolean force = (Boolean) params[0];
                    config.setForce(force.booleanValue());
                }
                targetEnv.checkpoint(config);
                return null;
            } else if (actionName.equals(OP_SYNC)) {
                targetEnv.sync();
                return null;
            } else if (actionName.equals(OP_ENV_STAT)) {
                return targetEnv.getStats
                    (getStatsConfig(params)).toString();
            } else if (actionName.equals(OP_TXN_STAT)) {
                return targetEnv.getTransactionStats
                    (getStatsConfig(params)).toString();
            } else if (actionName.equals(OP_DB_NAMES)) {
                return targetEnv.getDatabaseNames();
            } else if (actionName.equals(OP_DB_STAT)) {
                DatabaseStats stats = getDatabaseStats(targetEnv, params);
                return stats != null ? stats.toString() : null;
            }
        }

        return new IllegalArgumentException
            ("actionName: " + actionName + " is not valid");
    } catch (Exception e) {

        /*
         * Add both the message and the exception for easiest deciphering
         * of the problem. Sometimes the original exception stacktrace gets
         * hidden in server logs.
         */
        throw new MBeanException(e, e.getMessage());
    }
}
 

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
/**
 * A mechanism for efficiently comparing two quiescent environments, one
 * local and one on a remote machine.
 *
 * @param env a valid, open Environment handle
 * @param addr the address of the remote machine
 * @return true if all the databases in both environments are the same
 * @throws IOException if a network error occurs
 * @throws ProtocolException if an unexpected message is received
 * @throws ServiceConnectFailedException if the remote service was busy
 * @throws Exception
 */
public boolean diff(Environment env, InetSocketAddress addr)
    throws IOException,
           ProtocolException,
           ServiceConnectFailedException,
           Exception {

    List<String> envNames = env.getDatabaseNames();
    boolean ret = true;

    SocketChannel channel = connect(addr);

    final Protocol protocol = new Protocol(
            new NameIdPair("Ldiff", -1),
            DbInternal.getEnvironmentImpl(env));
    protocol.write(protocol.new EnvDiff(), channel);

    /*
     * Check that the number of local databases matches the number of
     * remote databases.  This is how we detect a remote db that doesn't
     * exist locally.
     */
    Protocol.EnvInfo msg = protocol.read(channel, Protocol.EnvInfo.class);
    ret = (envNames.size() == msg.getNumberOfDBs());
    if (!ret) {
        output("Number of databases in local and remote environments " +
               "does not match.");
    }
    channel.close();

    /*
     * Run LDiff for every database in the local environment.  If they all
     * succeed, the environments match.
     */
    for (String dbName : envNames) {
        channel = connect(addr);

        DatabaseConfig dbConfig = new DatabaseConfig();
        dbConfig.setReadOnly(true);
        DbInternal.setUseExistingConfig(dbConfig, true);
        Database db;
        try {
            db = env.openDatabase(null, dbName, dbConfig);
        } catch (DatabaseNotFoundException e) {
            /* Should never happen, ExclusiveCreate is false. */
            throw EnvironmentFailureException.unexpectedException(e);
        }

        try {
            if (!diff(db, channel)) {
                ret = false;
            }
        } catch (ProtocolException pe) {
            output(dbName + " does not exist in remote environment.");
            ret = false;
        } finally {
            db.close();
            if (channel.isOpen()) {
                channel.close();
            }
        }
    }
    if (ret) {
        output("Local environment matches remote.");
    } else {
        output("Local environment does not match remote.");
    }
    return ret;
}