com.mongodb

Class Bytes

java.lang.Object

org.bson.BSON

com.mongodb.Bytes

public class Bytes
extends BSON

Class that hold definitions of the wire protocol

Field Summary

Fields

Modifier and Type	Field and Description
static ByteOrder	ORDER Little-endian
static int	QUERYOPTION_AWAITDATA Use with TailableCursor.
static int	QUERYOPTION_EXHAUST Stream the data down full blast in multiple "more" packages, on the assumption that the client will fully read all data queried.
static int	QUERYOPTION_NOTIMEOUT The server normally times out idle cursors after an inactivity period (10 minutes) to prevent excess memory use.
static int	QUERYOPTION_OPLOGREPLAY Internal replication use only - driver should not set
static int	QUERYOPTION_PARTIAL Use with sharding (mongos).
static int	QUERYOPTION_SLAVEOK When turned on, read queries will be directed to slave servers instead of the primary server.
static int	QUERYOPTION_TAILABLE Tailable means cursor is not closed when the last data is retrieved.
static int	RESULTFLAG_AWAITCAPABLE Set when the server supports the AwaitData Query option.
static int	RESULTFLAG_CURSORNOTFOUND Set when getMore is called but the cursor id is not valid at the server.
static int	RESULTFLAG_ERRSET Set when query failed.
static int	RESULTFLAG_SHARDCONFIGSTALE Drivers should ignore this.

Fields inherited from class org.bson.BSON

ARRAY, B_BINARY, B_FUNC, B_GENERAL, B_UUID, BINARY, BOOLEAN, CODE, CODE_W_SCOPE, DATE, EOO, MAXKEY, MINKEY, NULL, NUMBER, NUMBER_INT, NUMBER_LONG, OBJECT, OID, REF, REGEX, STRING, SYMBOL, TIMESTAMP, UNDEFINED

Constructor Summary

Constructors

Constructor and Description
Bytes()

Method Summary

Methods

Modifier and Type	Method and Description
static byte	getType(Object object) Gets the type byte for a given object.

Methods inherited from class org.bson.BSON

addDecodingHook, addEncodingHook, applyDecodingHooks, applyEncodingHooks, clearAllHooks, clearDecodingHooks, clearEncodingHooks, decode, encode, getDecodingHooks, getEncodingHooks, hasDecodeHooks, hasEncodeHooks, regexFlag, regexFlags, regexFlags, removeDecodingHook, removeDecodingHooks, removeEncodingHook, removeEncodingHooks, toInt

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ORDER

public static final ByteOrder ORDER

Little-endian

QUERYOPTION_TAILABLE

public static final int QUERYOPTION_TAILABLE

Tailable means cursor is not closed when the last data is retrieved. Rather, the cursor marks the final object's position. You can resume using the cursor later, from where it was located, if more data were received. Like any "latent cursor", the cursor may become invalid at some point (CursorNotFound) - for example if the final object it references were deleted.

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Constant Field Values

QUERYOPTION_SLAVEOK

public static final int QUERYOPTION_SLAVEOK

When turned on, read queries will be directed to slave servers instead of the primary server.

See Also:

Constant Field Values

QUERYOPTION_OPLOGREPLAY

public static final int QUERYOPTION_OPLOGREPLAY

Internal replication use only - driver should not set

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Constant Field Values

QUERYOPTION_NOTIMEOUT

public static final int QUERYOPTION_NOTIMEOUT

The server normally times out idle cursors after an inactivity period (10 minutes) to prevent excess memory use. Set this option to prevent that.

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Constant Field Values

QUERYOPTION_AWAITDATA

public static final int QUERYOPTION_AWAITDATA

Use with TailableCursor. If we are at the end of the data, block for a while rather than returning no data. After a timeout period, we do return as normal.

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Constant Field Values

QUERYOPTION_EXHAUST

public static final int QUERYOPTION_EXHAUST

Stream the data down full blast in multiple "more" packages, on the assumption that the client will fully read all data queried. Faster when you are pulling a lot of data and know you want to pull it all down. Note: the client is not allowed to not read all the data unless it closes the connection.

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Constant Field Values

QUERYOPTION_PARTIAL

public static final int QUERYOPTION_PARTIAL

Use with sharding (mongos). Allows partial results from a sharded system if any shards are down/missing from the cluster. If not used an error will be returned from the mongos server.

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Constant Field Values

RESULTFLAG_CURSORNOTFOUND

public static final int RESULTFLAG_CURSORNOTFOUND

Set when getMore is called but the cursor id is not valid at the server. Returned with zero results.

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Constant Field Values

RESULTFLAG_ERRSET

public static final int RESULTFLAG_ERRSET

Set when query failed. Results consist of one document containing an "$err" field describing the failure.

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Constant Field Values

RESULTFLAG_SHARDCONFIGSTALE

public static final int RESULTFLAG_SHARDCONFIGSTALE

Drivers should ignore this. Only mongos will ever see this set, in which case, it needs to update config from the server.

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Constant Field Values

RESULTFLAG_AWAITCAPABLE

public static final int RESULTFLAG_AWAITCAPABLE

Set when the server supports the AwaitData Query option. If it doesn't, a client should sleep a little between getMore's of a Tailable cursor. Mongod version 1.6 supports AwaitData and thus always sets AwaitCapable.

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Constant Field Values

Constructor Detail

Bytes

public Bytes()

Method Detail

getType

public static byte getType(Object object)

Gets the type byte for a given object.

Parameters:

object - the object

Returns:

the byte value associated with the type, or -1 if no type is matched