DBPortPool get(InetSocketAddress addr) {
DBPortPool p = _pools.get(addr);
if (p != null) return p;
synchronized (_pools) {
p = _pools.get(addr);
if (p != null) {
return p;
}
p = new DBPortPool(addr, _options);
_pools.put(addr, p);
String name = "com.mongodb:type=ConnectionPool,host=" + addr.toString().replace(':', '_');
try {
ObjectName on = new ObjectName(name);
if (_server.isRegistered(on)) {
_server.unregisterMBean(on);
Bytes.LOGGER.log(
Level.INFO, "multiple Mongo instances for same host, jmx numbers might be off");
}
_server.registerMBean(p, on);
} catch (JMException e) {
Bytes.LOGGER.log(Level.WARNING, "jmx registration error, continuing", e);
} catch (java.security.AccessControlException e) {
Bytes.LOGGER.log(Level.WARNING, "jmx registration error, continuing", e);
}
}
return p;
}
void gotError(Exception e) {
if (e instanceof java.nio.channels.ClosedByInterruptException
|| e instanceof InterruptedException) {
// this is probably a request that is taking too long
// so usually doesn't mean there is a real db problem
return;
}
if (e instanceof java.net.SocketTimeoutException && _options.socketTimeout > 0) {
// we don't want to clear the port pool for 1 connection timing out
return;
}
// We don't want to clear the entire pool for the occasional error.
if (e instanceof SocketException) {
if (recentFailures < ALLOWED_ERRORS_BEFORE_CLEAR) {
return;
}
}
Bytes.LOGGER.log(Level.INFO, "emptying DBPortPool b/c of error", e);
clear();
}
/**
* A database connection with internal connection pooling. For most applications, you should have
* one Mongo instance for the entire JVM.
*
* <p>The following are equivalent, and all connect to the local database running on the default
* port:
*
* <pre>
* Mongo mongo1 = new Mongo();
* Mongo mongo1 = new Mongo("localhost");
* Mongo mongo2 = new Mongo("localhost", 27017);
* Mongo mongo4 = new Mongo(new ServerAddress("localhost"));
* </pre>
*
* <p>You can connect to a <a href="http://www.mongodb.org/display/DOCS/Replica+Sets">replica
* set</a> using the Java driver by passing a ServerAddress list to the Mongo constructor. For
* example:
*
* <pre>
* Mongo mongo = new Mongo(Arrays.asList(
* new ServerAddress("localhost", 27017),
* new ServerAddress("localhost", 27018),
* new ServerAddress("localhost", 27019)));
* </pre>
*
* You can connect to a sharded cluster using the same constructor. Mongo will auto-detect whether
* the servers are a list of replica set members or a list of mongos servers.
*
* <p>By default, all read and write operations will be made on the primary, but it's possible to
* read from secondaries by changing the read preference:
*
* <p>
*
* <pre>
* mongo.setReadPreference(ReadPreference.secondary());
* </pre>
*
* By default, write operations will not throw exceptions on failure, but that is easily changed
* too:
*
* <p>
*
* <pre>
* mongo.setWriteConcern(WriteConcern.SAFE);
* </pre>
*
* Note: This class has been superseded by {@code MongoClient}, and may be deprecated in a future
* release.
*
* @see MongoClient
* @see ReadPreference
* @see WriteConcern
*/
public class Mongo {
static Logger logger = Logger.getLogger(Bytes.LOGGER.getName() + ".Mongo");
// Make sure you don't change the format of these two static variables. A preprocessing regexp
// is applied and updates the version based on configuration in build.properties.
/** @deprecated Replaced by <code>Mongo.getMajorVersion()</code> */
@Deprecated public static final int MAJOR_VERSION = 2;
/** @deprecated Replaced by <code>Mongo.getMinorVersion()</code> */
@Deprecated public static final int MINOR_VERSION = 13;
private static final String FULL_VERSION = "2.13.0-SNAPSHOT";
static int cleanerIntervalMS;
private static final String ADMIN_DATABASE_NAME = "admin";
static {
cleanerIntervalMS =
Integer.parseInt(System.getProperty("com.mongodb.cleanerIntervalMS", "1000"));
}
/**
* Gets the major version of this library
*
* @return the major version, e.g. 2
* @deprecated Please use {@link #getVersion()} instead.
*/
@Deprecated
public static int getMajorVersion() {
return MAJOR_VERSION;
}
/**
* Gets the minor version of this library
*
* @return the minor version, e.g. 8
* @deprecated Please use {@link #getVersion()} instead.
*/
@Deprecated
public static int getMinorVersion() {
return MINOR_VERSION;
}
/**
* Connect to the MongoDB instance at the given address, select and return the {@code DB}
* specified in the {@code DBAddress} parameter.
*
* @param addr The details of the server and database to connect to
* @return the DB requested in the addr parameter.
* @throws MongoException
* @deprecated Please use {@link MongoClient#getDB(String)} instead.
*/
@Deprecated
public static DB connect(DBAddress addr) {
return new Mongo(addr).getDB(addr.getDBName());
}
/**
* Creates a Mongo instance based on a (single) mongodb node (localhost, default port)
*
* @throws UnknownHostException
* @throws MongoException
* @deprecated Replaced by {@link MongoClient#MongoClient()})
*/
@Deprecated
public Mongo() throws UnknownHostException {
this(new ServerAddress());
}
/**
* Creates a Mongo instance based on a (single) mongodb node (default port)
*
* @param host server to connect to
* @throws UnknownHostException if the database host cannot be resolved
* @throws MongoException
* @deprecated Replaced by {@link MongoClient#MongoClient(String)}
*/
@Deprecated
public Mongo(String host) throws UnknownHostException {
this(new ServerAddress(host));
}
/**
* Creates a Mongo instance based on a (single) mongodb node (default port)
*
* @param host server to connect to
* @param options default query options
* @throws UnknownHostException if the database host cannot be resolved
* @throws MongoException
* @deprecated Replaced by {@link MongoClient#MongoClient(String, MongoClientOptions)}
*/
@Deprecated
public Mongo(String host, MongoOptions options) throws UnknownHostException {
this(new ServerAddress(host), options);
}
/**
* Creates a Mongo instance based on a (single) mongodb node
*
* @param host the database's host address
* @param port the port on which the database is running
* @throws UnknownHostException if the database host cannot be resolved
* @throws MongoException
* @deprecated Replaced by {@link MongoClient#MongoClient(String, int)}
*/
@Deprecated
public Mongo(String host, int port) throws UnknownHostException {
this(new ServerAddress(host, port));
}
/**
* Creates a Mongo instance based on a (single) mongodb node
*
* @see com.mongodb.ServerAddress
* @param addr the database address
* @throws MongoException
* @deprecated Replaced by {@link MongoClient#MongoClient(ServerAddress)}
*/
@Deprecated
public Mongo(ServerAddress addr) {
this(addr, new MongoOptions());
}
/**
* Creates a Mongo instance based on a (single) mongo node using a given ServerAddress
*
* @see com.mongodb.ServerAddress
* @param addr the database address
* @param options default query options
* @throws MongoException
* @deprecated Replaced by {@link MongoClient#MongoClient(ServerAddress, MongoClientOptions)}
*/
@Deprecated
public Mongo(ServerAddress addr, MongoOptions options) {
this(MongoAuthority.direct(addr), options);
}
/**
* Creates a Mongo in paired mode. <br>
* This will also work for a replica set and will find all members (the master will be used by
* default).
*
* @see com.mongodb.ServerAddress
* @param left left side of the pair
* @param right right side of the pair
* @throws MongoException
*/
@Deprecated
public Mongo(ServerAddress left, ServerAddress right) {
this(left, right, new MongoOptions());
}
/**
* Creates a Mongo connection in paired mode. <br>
* This will also work for a replica set and will find all members (the master will be used by
* default).
*
* @see com.mongodb.ServerAddress
* @param left left side of the pair
* @param right right side of the pair
* @param options the optional settings for the Mongo instance
* @throws MongoException
* @deprecated Please use {@link MongoClient#MongoClient(java.util.List, MongoClientOptions)}
* instead.
*/
@Deprecated
public Mongo(ServerAddress left, ServerAddress right, MongoOptions options) {
this(MongoAuthority.dynamicSet(Arrays.asList(left, right)), options);
}
/**
* Creates a Mongo based on a list of replica set members or a list of mongos. It will find all
* members (the master will be used by default). If you pass in a single server in the list, the
* driver will still function as if it is a replica set. If you have a standalone server, use the
* Mongo(ServerAddress) constructor.
*
* <p>If this is a list of mongos servers, it will pick the closest (lowest ping time) one to send
* all requests to, and automatically fail over to the next server if the closest is down.
*
* @see com.mongodb.ServerAddress
* @param seeds Put as many servers as you can in the list and the system will figure out the
* rest. This can either be a list of mongod servers in the same replica set or a list of
* mongos servers in the same sharded cluster.
* @throws MongoException
* @deprecated Replaced by {@link MongoClient#MongoClient(java.util.List)}
*/
@Deprecated
public Mongo(List<ServerAddress> seeds) {
this(seeds, new MongoOptions());
}
/**
* Creates a Mongo based on a list of replica set members or a list of mongos. It will find all
* members (the master will be used by default). If you pass in a single server in the list, the
* driver will still function as if it is a replica set. If you have a standalone server, use the
* Mongo(ServerAddress) constructor.
*
* <p>If this is a list of mongos servers, it will pick the closest (lowest ping time) one to send
* all requests to, and automatically fail over to the next server if the closest is down.
*
* @see com.mongodb.ServerAddress
* @param seeds Put as many servers as you can in the list and the system will figure out the
* rest. This can either be a list of mongod servers in the same replica set or a list of
* mongos servers in the same sharded cluster.
* @param options for configuring this Mongo instance
* @throws MongoException
* @deprecated Replaced by {@link MongoClient#MongoClient(java.util.List, MongoClientOptions)}
*/
@Deprecated
public Mongo(List<ServerAddress> seeds, MongoOptions options) {
this(MongoAuthority.dynamicSet(seeds), options);
}
/**
* Creates a Mongo described by a URI. If only one address is used it will only connect to that
* node, otherwise it will discover all nodes. If the URI contains database credentials, the
* database will be authenticated lazily on first use with those credentials.
*
* @param uri the URI to connect to.
* <p>examples:
* <ul>
* <li>mongodb://localhost
* <li>mongodb://fred:foobar@localhost/
* </ul>
*
* @throws MongoException
* @throws UnknownHostException
* @dochub connections
* @deprecated Replaced by {@link MongoClient#MongoClient(MongoClientURI)}
*/
@Deprecated
public Mongo(MongoURI uri) throws UnknownHostException {
this(getMongoAuthorityFromURI(uri), uri.getOptions());
}
/**
* Creates a Mongo based on an authority and options.
*
* <p>Note: This constructor is provisional and is subject to change before the final release
*
* @param authority the authority
* @param options the options
*/
Mongo(MongoAuthority authority, MongoOptions options) {
logger.info(
"Creating Mongo instance (driver version "
+ getVersion()
+ ") with authority "
+ authority
+ " and options "
+ options);
_authority = authority;
_options = options;
_applyMongoOptions();
_connector = new DBTCPConnector(this);
_connector.start();
if (_options.cursorFinalizerEnabled) {
_cleaner = new CursorCleanerThread();
_cleaner.start();
} else {
_cleaner = null;
}
}
/**
* Gets a database object from this MongoDB instance.
*
* @param dbname the name of the database to retrieve
* @return a DB representing the specified database
*/
public DB getDB(String dbname) {
DB db = _dbs.get(dbname);
if (db != null) return db;
db = new DBApiLayer(this, dbname, _connector);
DB temp = _dbs.putIfAbsent(dbname, db);
if (temp != null) return temp;
return db;
}
/**
* Returns the list of databases used by the driver since this Mongo instance was created. This
* may include DBs that exist in the client but not yet on the server.
*
* @return a collection of database objects
*/
public Collection<DB> getUsedDatabases() {
return _dbs.values();
}
/**
* Gets a list of the names of all databases on the connected server.
*
* @return list of database names
* @throws MongoException
*/
public List<String> getDatabaseNames() {
BasicDBObject cmd = new BasicDBObject();
cmd.put("listDatabases", 1);
CommandResult res = getDB(ADMIN_DATABASE_NAME).command(cmd, getOptions());
res.throwOnError();
List l = (List) res.get("databases");
List<String> list = new ArrayList<String>();
for (Object o : l) {
list.add(((BasicDBObject) o).getString("name"));
}
return list;
}
/**
* Drops the database if it exists.
*
* @param dbName name of database to drop
* @throws MongoException
*/
public void dropDatabase(String dbName) {
getDB(dbName).dropDatabase();
}
/**
* gets this driver version
*
* @return the full version string of this driver, e.g. "2.8.0"
*/
public String getVersion() {
return FULL_VERSION;
}
/**
* Get a String for debug purposes.
*
* @return a string representing the hosts used in this Mongo instance
* @deprecated This method is NOT a part of public API and will be dropped in 3.x versions.
*/
@Deprecated
public String debugString() {
return _connector.debugString();
}
/**
* Gets a {@code String} representation of current connection point, i.e. master.
*
* @return server address in a host:port form
*/
public String getConnectPoint() {
return _connector.getConnectPoint();
}
/**
* Gets the underlying TCP connector
*
* @return A DBTCPConnector representing the connection to MongoDB
* @deprecated {@link DBTCPConnector} is NOT part of the public API. It will be dropped in 3.x
* releases.
*/
@Deprecated
public DBTCPConnector getConnector() {
return _connector;
}
/**
* Get the status of the replica set cluster.
*
* @return replica set status information
*/
public ReplicaSetStatus getReplicaSetStatus() {
return _connector.getReplicaSetStatus();
}
/**
* Gets the address of the current master
*
* @return the address
*/
public ServerAddress getAddress() {
return _connector.getAddress();
}
/**
* Gets a list of all server addresses used when this Mongo was created
*
* @return list of server addresses
* @throws MongoException
*/
public List<ServerAddress> getAllAddress() {
List<ServerAddress> result = _connector.getAllAddress();
if (result == null) {
return Arrays.asList(getAddress());
}
return result;
}
/**
* Gets the list of server addresses currently seen by this client. This includes addresses
* auto-discovered from a replica set.
*
* @return list of server addresses
* @throws MongoException
*/
public List<ServerAddress> getServerAddressList() {
return _connector.getServerAddressList();
}
/**
* Closes the underlying connector, which in turn closes all open connections. Once called, this
* Mongo instance can no longer be used.
*/
public void close() {
try {
_connector.close();
} catch (final Throwable t) {
/* nada */
}
if (_cleaner != null) {
_cleaner.interrupt();
try {
_cleaner.join();
} catch (InterruptedException e) {
// end early
}
}
}
/**
* Sets the write concern for this database. Will be used as default for writes to any collection
* in any database. See the documentation for {@link WriteConcern} for more information.
*
* @param concern write concern to use
*/
public void setWriteConcern(WriteConcern concern) {
_concern = concern;
}
/**
* Gets the default write concern
*
* @return the default write concern
*/
public WriteConcern getWriteConcern() {
return _concern;
}
/**
* Sets the read preference for this database. Will be used as default for reads from any
* collection in any database. See the documentation for {@link ReadPreference} for more
* information.
*
* @param preference Read Preference to use
*/
public void setReadPreference(ReadPreference preference) {
_readPref = preference;
}
/**
* Gets the default read preference
*
* @return the default read preference
*/
public ReadPreference getReadPreference() {
return _readPref;
}
/**
* makes it possible to run read queries on secondary nodes
*
* @deprecated Replaced with {@code ReadPreference.secondaryPreferred()}
* @see ReadPreference#secondaryPreferred()
*/
@Deprecated
public void slaveOk() {
addOption(Bytes.QUERYOPTION_SLAVEOK);
}
/**
* Add a default query option keeping any previously added options.
*
* @param option value to be added to current options
*/
public void addOption(int option) {
_netOptions.add(option);
}
/**
* Set the default query options. Overrides any existing options.
*
* @param options value to be set
*/
public void setOptions(int options) {
_netOptions.set(options);
}
/** Reset the default query options */
public void resetOptions() {
_netOptions.reset();
}
/**
* Gets the default query options
*
* @return an int representing the options to be used by queries
*/
public int getOptions() {
return _netOptions.get();
}
/**
* Helper method for setting up MongoOptions at instantiation so that any options which affect
* this connection can be set.
*/
@SuppressWarnings("deprecation")
void _applyMongoOptions() {
if (_options.slaveOk) {
slaveOk();
}
if (_options.getReadPreference() != null) {
setReadPreference(_options.getReadPreference());
}
setWriteConcern(_options.getWriteConcern());
}
/**
* Returns the mongo options.
*
* @deprecated Please use {@link MongoClient} and corresponding {@link
* com.mongodb.MongoClient#getMongoClientOptions()}
* @return A {@link com.mongodb.MongoOptions} containing the settings for this MongoDB instance.
*/
@Deprecated
public MongoOptions getMongoOptions() {
return _options;
}
/**
* Gets the maximum size for a BSON object supported by the current master server. Note that this
* value may change over time depending on which server is master. If the size is not known yet, a
* request may be sent to the master server
*
* @return the maximum size
* @throws MongoException
*/
public int getMaxBsonObjectSize() {
return _connector.getMaxBsonObjectSize();
}
boolean isMongosConnection() {
return _connector.isMongosConnection();
}
private static MongoAuthority getMongoAuthorityFromURI(final MongoURI uri)
throws UnknownHostException {
if (uri.getHosts().size() == 1) {
return MongoAuthority.direct(new ServerAddress(uri.getHosts().get(0)), uri.getCredentials());
} else {
List<ServerAddress> replicaSetSeeds = new ArrayList<ServerAddress>(uri.getHosts().size());
for (String host : uri.getHosts()) replicaSetSeeds.add(new ServerAddress(host));
return MongoAuthority.dynamicSet(replicaSetSeeds, uri.getCredentials());
}
}
final MongoOptions _options;
final DBTCPConnector _connector;
final ConcurrentMap<String, DB> _dbs = new ConcurrentHashMap<String, DB>();
private WriteConcern _concern = WriteConcern.NORMAL;
private ReadPreference _readPref = ReadPreference.primary();
final Bytes.OptionHolder _netOptions = new Bytes.OptionHolder(null);
final CursorCleanerThread _cleaner;
final MongoAuthority _authority;
org.bson.util.SimplePool<PoolOutputBuffer> _bufferPool =
new org.bson.util.SimplePool<PoolOutputBuffer>(1000) {
protected PoolOutputBuffer createNew() {
return new PoolOutputBuffer();
}
};
/**
* Forces the master server to fsync the RAM data to disk This is done automatically by the server
* at intervals, but can be forced for better reliability.
*
* @param async if true, the fsync will be done asynchronously on the server.
* @return result of the command execution
* @throws MongoException
* @mongodb.driver.manual reference/command/fsync/ fsync command
*/
public CommandResult fsync(boolean async) {
DBObject cmd = new BasicDBObject("fsync", 1);
if (async) {
cmd.put("async", 1);
}
CommandResult result = getDB(ADMIN_DATABASE_NAME).command(cmd);
result.throwOnError();
return result;
}
/**
* Forces the master server to fsync the RAM data to disk, then lock all writes. The database will
* be read-only after this command returns.
*
* @return result of the command execution
* @throws MongoException
* @mongodb.driver.manual reference/command/fsync/ fsync command
*/
public CommandResult fsyncAndLock() {
DBObject cmd = new BasicDBObject("fsync", 1);
cmd.put("lock", 1);
CommandResult result = getDB(ADMIN_DATABASE_NAME).command(cmd);
result.throwOnError();
return result;
}
/**
* Unlocks the database, allowing the write operations to go through. This command may be
* asynchronous on the server, which means there may be a small delay before the database becomes
* writable.
*
* @return {@code DBObject} in the following form {@code {"ok": 1,"info": "unlock completed"}}
* @throws MongoException
* @mongodb.driver.manual reference/command/fsync/ fsync command
*/
public DBObject unlock() {
DB db = getDB(ADMIN_DATABASE_NAME);
DBCollection col = db.getCollection("$cmd.sys.unlock");
return col.findOne();
}
/**
* Returns true if the database is locked (read-only), false otherwise.
*
* @return result of the command execution
* @throws MongoException
* @mongodb.driver.manual reference/command/fsync/ fsync command
*/
public boolean isLocked() {
DB db = getDB(ADMIN_DATABASE_NAME);
DBCollection col = db.getCollection("$cmd.sys.inprog");
BasicDBObject res = (BasicDBObject) col.findOne();
if (res.containsField("fsyncLock")) {
return res.getInt("fsyncLock") == 1;
}
return false;
}
// -------
/**
* Mongo.Holder can be used as a static place to hold several instances of Mongo. Security is not
* enforced at this level, and needs to be done on the application side.
*/
public static class Holder {
/**
* Attempts to find an existing MongoClient instance matching that URI in the holder, and
* returns it if exists. Otherwise creates a new Mongo instance based on this URI and adds it to
* the holder.
*
* @param uri the Mongo URI
* @return the client
* @throws MongoException
* @throws UnknownHostException
* @deprecated Please use {@link #connect(MongoClientURI)} instead.
*/
@Deprecated
public Mongo connect(final MongoURI uri) throws UnknownHostException {
return connect(uri.toClientURI());
}
/**
* Attempts to find an existing MongoClient instance matching that URI in the holder, and
* returns it if exists. Otherwise creates a new Mongo instance based on this URI and adds it to
* the holder.
*
* @param uri the Mongo URI
* @return the client
* @throws MongoException
* @throws UnknownHostException
*/
public Mongo connect(final MongoClientURI uri) throws UnknownHostException {
final String key = toKey(uri);
Mongo client = _mongos.get(key);
if (client == null) {
final Mongo newbie = new MongoClient(uri);
client = _mongos.putIfAbsent(key, newbie);
if (client == null) {
client = newbie;
} else {
newbie.close();
}
}
return client;
}
private String toKey(final MongoClientURI uri) {
return uri.toString();
}
public static Holder singleton() {
return _default;
}
private static Holder _default = new Holder();
private final ConcurrentMap<String, Mongo> _mongos = new ConcurrentHashMap<String, Mongo>();
}
class CursorCleanerThread extends Thread {
CursorCleanerThread() {
setDaemon(true);
setName("MongoCleaner" + hashCode());
}
public void run() {
while (_connector.isOpen()) {
try {
try {
Thread.sleep(cleanerIntervalMS);
} catch (InterruptedException e) {
// caused by the Mongo instance being closed -- proceed with cleanup
}
for (DB db : _dbs.values()) {
db.cleanCursors(true);
}
} catch (Throwable t) {
// thread must never die
}
}
}
}
@Override
public String toString() {
return "Mongo{" + "authority=" + _authority + ", options=" + _options + '}';
}
/**
* Gets the authority, which includes the connection type, the server address(es), and the
* credentials.
*
* @return the authority
*/
MongoAuthority getAuthority() {
return _authority;
}
}
class DBTCPConnector implements DBConnector {
static Logger _logger = Logger.getLogger(Bytes.LOGGER.getName() + ".tcp");
static Logger _createLogger = Logger.getLogger(_logger.getName() + ".connect");
public DBTCPConnector(Mongo m, ServerAddress addr) throws MongoException {
_mongo = m;
_portHolder = new DBPortPool.Holder(m._options);
_checkAddress(addr);
_createLogger.info(addr.toString());
if (addr.isPaired()) {
_allHosts = new ArrayList<ServerAddress>(addr.explode());
_createLogger.info("switch to paired mode : " + _allHosts + " -> " + _curAddress);
} else {
_set(addr);
_allHosts = null;
}
}
public DBTCPConnector(Mongo m, ServerAddress... all) throws MongoException {
this(m, Arrays.asList(all));
}
public DBTCPConnector(Mongo m, List<ServerAddress> all) throws MongoException {
_mongo = m;
_portHolder = new DBPortPool.Holder(m._options);
_checkAddress(all);
_allHosts = new ArrayList<ServerAddress>(all); // make a copy so it can't be modified
_createLogger.info(all + " -> " + _curAddress);
}
private static ServerAddress _checkAddress(ServerAddress addr) {
if (addr == null) throw new NullPointerException("address can't be null");
return addr;
}
private static ServerAddress _checkAddress(List<ServerAddress> addrs) {
if (addrs == null) throw new NullPointerException("addresses can't be null");
if (addrs.size() == 0) throw new IllegalArgumentException("need to specify at least 1 address");
return addrs.get(0);
}
/**
* Start a "request".
*
* <p>A "request" is a group of operations in which order matters. Examples include inserting a
* document and then performing a query which expects that document to have been inserted, or
* performing an operation and then using com.mongodb.Mongo.getLastError to perform error-checking
* on that operation. When a thread performs operations in a "request", all operations will be
* performed on the same socket, so they will be correctly ordered.
*/
public void requestStart() {
_threadPort.get().requestStart();
}
/**
* End the current "request", if this thread is in one.
*
* <p>By ending a request when it is safe to do so the built-in connection- pool is allowed to
* reassign requests to different sockets in order to more effectively balance load. See
* requestStart for more information.
*/
public void requestDone() {
_threadPort.get().requestDone();
}
public void requestEnsureConnection() {
_threadPort.get().requestEnsureConnection();
}
WriteResult _checkWriteError(MyPort mp, DBPort port) throws MongoException {
CommandResult e = _mongo.getDB("admin").getLastError();
mp.done(port);
Object foo = e.get("err");
if (foo == null) return new WriteResult(e);
int code = -1;
if (e.get("code") instanceof Number) code = ((Number) e.get("code")).intValue();
String s = foo.toString();
if (code == 11000 || code == 11001 || s.startsWith("E11000") || s.startsWith("E11001"))
throw new MongoException.DuplicateKey(code, s);
throw new MongoException(code, s);
}
public WriteResult say(DB db, OutMessage m, DB.WriteConcern concern) throws MongoException {
MyPort mp = _threadPort.get();
DBPort port = mp.get(true);
port.checkAuth(db);
try {
port.say(m);
if (concern == DB.WriteConcern.STRICT) {
return _checkWriteError(mp, port);
} else {
mp.done(port);
return new WriteResult(db, port);
}
} catch (IOException ioe) {
mp.error(ioe);
_error(ioe);
if (concern == DB.WriteConcern.NONE) {
CommandResult res = new CommandResult();
res.put("ok", false);
res.put("$err", "NETWORK ERROR");
return new WriteResult(res);
}
throw new MongoException.Network("can't say something", ioe);
} catch (MongoException me) {
throw me;
} catch (RuntimeException re) {
mp.error(re);
throw re;
}
}
public Response call(DB db, DBCollection coll, OutMessage m) throws MongoException {
return call(db, coll, m, 2);
}
public Response call(DB db, DBCollection coll, OutMessage m, int retries) throws MongoException {
final MyPort mp = _threadPort.get();
final DBPort port = mp.get(false);
port.checkAuth(db);
Response res = null;
try {
res = port.call(m, coll);
mp.done(port);
} catch (IOException ioe) {
mp.error(ioe);
if (_error(ioe) && retries > 0) {
return call(db, coll, m, retries - 1);
}
throw new MongoException.Network("can't call something", ioe);
} catch (RuntimeException re) {
mp.error(re);
throw re;
}
ServerError err = res.getError();
if (err != null && err.isNotMasterError()) {
_pickCurrent();
if (retries <= 0) {
throw new MongoException("not talking to master and retries used up");
}
return call(db, coll, m, retries - 1);
}
return res;
}
public ServerAddress getAddress() {
return _curAddress;
}
public List<ServerAddress> getAllAddress() {
return _allHosts;
}
public String getConnectPoint() {
return _curAddress.toString();
}
boolean _error(Throwable t) throws MongoException {
if (_allHosts != null) {
System.out.println("paired mode, switching master b/c of: " + t);
t.printStackTrace();
_pickCurrent();
}
return true;
}
class MyPort {
DBPort get(boolean keep) {
_internalStack++;
if (_internalStack > 1) {
if (_last == null) {
System.err.println("_internalStack > 1 and _last is null!");
} else {
return _last;
}
}
if (_port != null) return _port;
try {
DBPort p = _curPortPool.get();
if (keep && _inRequest) _port = p;
_last = p;
return p;
} catch (DBPortPool.NoMoreConnection nmc) {
_internalStack = 0;
throw nmc;
}
}
void done(DBPort p) {
if (_internalStack <= 0) {
int prev = _internalStack;
_reset();
throw new IllegalStateException("done called and _internalStack was: " + _internalStack);
}
_internalStack--;
if (p != _port && _internalStack == 0) _curPortPool.done(p);
if (_internalStack < 0) {
System.err.println("_internalStack < 0 : " + _internalStack);
_internalStack = 0;
}
}
void error(Exception e) {
_curPortPool.remove(_port);
_curPortPool.gotError(e);
_internalStack = 0;
_last = null;
}
void requestEnsureConnection() {
if (!_inRequest) return;
if (_port != null) return;
_port = _curPortPool.get();
}
void requestStart() {
_inRequest = true;
if (_port != null) {
_port = null;
System.err.println("ERROR. somehow _port was not null at requestStart");
}
}
void requestDone() {
if (_port != null) _curPortPool.done(_port);
_port = null;
_inRequest = false;
if (_internalStack > 0) {
System.err.println("_internalStack in requestDone should be 0 is: " + _internalStack);
_internalStack = 0;
}
}
void _reset() {
_internalStack = 0;
_port = null;
_last = null;
}
int _internalStack = 0;
DBPort _port;
DBPort _last;
boolean _inRequest;
}
void _pickInitial() throws MongoException {
if (_curAddress != null) return;
// we need to just get a server to query for ismaster
_pickCurrent();
try {
_logger.info("current address beginning of _pickInitial: " + _curAddress);
DBObject im = isMasterCmd();
if (_isMaster(im)) return;
synchronized (_allHosts) {
Collections.shuffle(_allHosts);
for (ServerAddress a : _allHosts) {
if (_curAddress == a) continue;
_logger.info("remote [" + _curAddress + "] -> [" + a + "]");
_set(a);
im = isMasterCmd();
if (_isMaster(im)) return;
_logger.severe("switched to: " + a + " but isn't master");
}
throw new MongoException("can't find master");
}
} catch (Exception e) {
_logger.log(Level.SEVERE, "can't pick initial master, using random one", e);
}
}
private void _pickCurrent() throws MongoException {
if (_allHosts == null)
throw new MongoException(
"got master/slave issue but not in master/slave mode on the client side");
synchronized (_allHosts) {
Collections.shuffle(_allHosts);
for (int i = 0; i < _allHosts.size(); i++) {
ServerAddress a = _allHosts.get(i);
if (a == _curAddress) continue;
if (_curAddress != null) {
_logger.info("switching from [" + _curAddress + "] to [" + a + "]");
}
_set(a);
return;
}
}
throw new MongoException("couldn't find a new host to swtich too");
}
private boolean _set(ServerAddress addr) {
if (_curAddress == addr) return false;
_curAddress = addr;
_curPortPool = _portHolder.get(addr.getSocketAddress());
return true;
}
public String debugString() {
StringBuilder buf = new StringBuilder("DBTCPConnector: ");
if (_allHosts != null) buf.append("paired : ").append(_allHosts);
else buf.append(_curAddress).append(" ").append(_curAddress._addr);
return buf.toString();
}
DBObject isMasterCmd() {
DBCollection collection = _mongo.getDB("admin").getCollection("$cmd");
Iterator<DBObject> i = collection.__find(_isMaster, null, 0, 1, 0);
if (i == null || !i.hasNext()) throw new MongoException("no result for ismaster query?");
DBObject res = i.next();
if (i.hasNext()) throw new MongoException("what's going on");
return res;
}
boolean _isMaster(DBObject res) {
Object x = res.get("ismaster");
if (x == null) throw new IllegalStateException("ismaster shouldn't be null: " + res);
if (x instanceof Boolean) return (Boolean) x;
if (x instanceof Number) return ((Number) x).intValue() == 1;
throw new IllegalArgumentException("invalid ismaster [" + x + "] : " + x.getClass().getName());
}
public void close() {
_portHolder.close();
}
final Mongo _mongo;
private ServerAddress _curAddress;
private DBPortPool _curPortPool;
private DBPortPool.Holder _portHolder;
private final List<ServerAddress> _allHosts;
private final ThreadLocal<MyPort> _threadPort =
new ThreadLocal<MyPort>() {
protected MyPort initialValue() {
return new MyPort();
}
};
private static final DBObject _isMaster = BasicDBObjectBuilder.start().add("ismaster", 1).get();
}
