org.infinispan.context

Enum Flag

java.lang.Object

java.lang.Enum<Flag>

org.infinispan.context.Flag

All Implemented Interfaces:

Serializable, Comparable<Flag>

public enum Flag
extends Enum<Flag>

Available flags, which may be set on a per-invocation basis. These are provided using the AdvancedCache interface, using some of the overloaded methods that allow passing in of a variable number of Flags. When making modifications to these enum, do not change the order of enumerations, so always append any new enumerations after the last one. Finally, enumerations should not be removed.

Since:

4.0

Author:

Manik Surtani, Galder Zamarreño

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Flag.Externalizer

Enum Constant Summary

Enum Constants

Enum Constant and Description
ALREADY_HAS_LOCK Flag to designate that this operation was performed on behalf of another that already has the lock for the given key.
BACKUP_WRITE Signals that a WriteCommand was sent from the primary as a backup operation.
CACHE_MODE_LOCAL Forces LOCAL mode operation, even if the cache is configured to use a clustered mode like replication, invalidation or distribution.
COMMAND_RETRY If a write operation encounters a retry due to a topology change this flag should be used to tell the new owner that such a thing happened.
FAIL_SILENTLY Swallows any exceptions, logging them instead at a low log level.
FORCE_ASYNCHRONOUS Forces asynchronous network calls where possible, even if otherwise configured to use synchronous network calls.
FORCE_SYNCHRONOUS Forces synchronous network calls where possible, even if otherwise configured to use asynchronous network calls.
FORCE_WRITE_LOCK Forces a write lock, even if the invocation is a read operation.
IGNORE_RETURN_VALUES Signals that a write operation's return value will be ignored, so reading the existing value from a store or from a remote node is not necessary.
IGNORE_TRANSACTION Flag that is used by keySet, entrySet and values methods so that they do not return transactional values.
IRAC_STATE Signals a WriteCommand as state transfer from remote site.
IRAC_UPDATE Signals a WriteCommand as an update from a remote site (async).
OPERATION_HOTROD Deprecated. Since 10.0, not in use.
OPERATION_MEMCACHED Deprecated. Since 10.0, not in use.
PUT_FOR_EXTERNAL_READ Flags the invocation as a Cache.putForExternalRead(Object, Object) call, as opposed to a regular BasicCache.put(Object, Object).
PUT_FOR_STATE_TRANSFER Flags the invocation as a put operation done internally by the state transfer.
PUT_FOR_X_SITE_STATE_TRANSFER Flags the invocation as a put operation done internally by the cross-site state transfer.
REMOTE_ITERATION Flag to identify that this iteration is done on a remote node and thus no additional wrappings are required
ROLLING_UPGRADE Flag to identity that data is being written as part of a Rolling Upgrade.
SKIP_CACHE_LOAD Skips loading an entry from any configured CacheLoaders.
SKIP_CACHE_STORE Skips storing an entry to any configured CacheLoaders.
SKIP_INDEX_CLEANUP Any time a new indexed entry is inserted, a delete statement is issued on the indexes to remove previous values.
SKIP_INDEXING Used by the Query module only, it will prevent the indexes to be updated as a result of the current operations.
SKIP_LISTENER_NOTIFICATION This flag skips listener notifications as a result of a cache operation.
SKIP_LOCKING Bypasses lock acquisition for this invocation altogether.
SKIP_OWNERSHIP_CHECK Ignore current consistent hash and read from data container/commit the change no matter what (if the flag is set).
SKIP_REMOTE_LOOKUP When used with distributed cache mode, will prevent retrieving a remote value either when executing a Map.get(Object) or Map.containsKey(Object), or to return the overwritten value for BasicCache.put(Object, Object) or BasicCache.remove(Object).
SKIP_SHARED_CACHE_STORE If this flag is enabled, if a cache store is shared, then storage to the store is skipped.
SKIP_SIZE_OPTIMIZATION Flag that can be used to skip any size optimizations - forcing iteration of entries to count.
SKIP_STATISTICS This flag skips statistics updates as a result of a cache operation.
SKIP_XSITE_BACKUP If cross-site replication is enabled, this would skip the replication to any remote site.
ZERO_LOCK_ACQUISITION_TIMEOUT Overrides the LockingConfiguration.lockAcquisitionTimeout(long) configuration setting by ensuring lock managers use a 0-millisecond lock acquisition timeout.

Method Summary

Modifier and Type	Method and Description
static Flag	valueOf(String name) Returns the enum constant of this type with the specified name.
static Flag[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

ZERO_LOCK_ACQUISITION_TIMEOUT

public static final Flag ZERO_LOCK_ACQUISITION_TIMEOUT

Overrides the LockingConfiguration.lockAcquisitionTimeout(long) configuration setting by ensuring lock managers use a 0-millisecond lock acquisition timeout. Useful if you only want to acquire a lock on an entry if and only if the lock is uncontended.

CACHE_MODE_LOCAL

public static final Flag CACHE_MODE_LOCAL

Forces LOCAL mode operation, even if the cache is configured to use a clustered mode like replication, invalidation or distribution. Applying this flag will suppress any RPC messages otherwise associated with this invocation. Write operations mat not acquire the entry locks. In distributed mode, the modifications performed during an operation in a non-owner node are going to L1, if it is enabled, otherwise the operation is a no-op in that node.

SKIP_LOCKING

public static final Flag SKIP_LOCKING

Bypasses lock acquisition for this invocation altogether. A potentially dangerous flag, as it can lead to inconsistent data: a Lock is needed to make sure the same value is written to each node replica; a lock is also needed to guarantee that several writes on the same key are not applied out of order to an async CacheLoader storage engine. So this flag is useful only as an optimization when the same key is written once and never again, or as an unsafe optimisation if the period between writes on the same key is large enough to make a race condition never happen in practice. If this is unclear, avoid it.

FORCE_WRITE_LOCK

public static final Flag FORCE_WRITE_LOCK

Forces a write lock, even if the invocation is a read operation. Useful when reading an entry to later update it within the same transaction, and is analogous in behavior and use case to a select ... for update ... SQL statement.

FORCE_ASYNCHRONOUS

public static final Flag FORCE_ASYNCHRONOUS

Forces asynchronous network calls where possible, even if otherwise configured to use synchronous network calls. Only applicable to non-local, clustered caches.

FORCE_SYNCHRONOUS

public static final Flag FORCE_SYNCHRONOUS

Forces synchronous network calls where possible, even if otherwise configured to use asynchronous network calls. Only applicable to non-local, clustered caches.

SKIP_CACHE_STORE

public static final Flag SKIP_CACHE_STORE

Skips storing an entry to any configured CacheLoaders.

SKIP_CACHE_LOAD

public static final Flag SKIP_CACHE_LOAD

Skips loading an entry from any configured CacheLoaders. Useful for example to perform a BasicCache.put(Object, Object) operation while not interested in the return value (i.e. the previous value of the key).
Note that the loader will be skipped even if that changes the meaning of the operation, e.g. for conditional write operations. If that is not intended, you should use IGNORE_RETURN_VALUES instead.

FAIL_SILENTLY

public static final Flag FAIL_SILENTLY

Swallows any exceptions, logging them instead at a low log level. Will prevent a failing operation from affecting any ongoing JTA transactions as well.

This Flag will not be replicated to remote nodes, but it will still protect the invoker from remote exceptions.

When using this flag with Optimistic caches, lock acquisition happen in the prepare phase at which point this flag will be ignored in order to ensure that Infinispan reports the correct exception back to the transaction manager. This is done for safety reasons to avoid inconsistent cache contents.

SKIP_REMOTE_LOOKUP

public static final Flag SKIP_REMOTE_LOOKUP

When used with distributed cache mode, will prevent retrieving a remote value either when executing a Map.get(Object) or Map.containsKey(Object), or to return the overwritten value for BasicCache.put(Object, Object) or BasicCache.remove(Object). This would render return values for most operations unusable, in exchange for the performance gains of reducing remote calls.
Note that the remote lookup will be skipped even if that changes the meaning of the operation, e.g. for conditional write operations. If that is not intended, you should use IGNORE_RETURN_VALUES instead.

SKIP_INDEXING

public static final Flag SKIP_INDEXING

Used by the Query module only, it will prevent the indexes to be updated as a result of the current operations.

PUT_FOR_EXTERNAL_READ

public static final Flag PUT_FOR_EXTERNAL_READ

Flags the invocation as a Cache.putForExternalRead(Object, Object) call, as opposed to a regular BasicCache.put(Object, Object). This flag was created purely for internal Infinispan usage, and should not be used by clients calling into Infinispan.

PUT_FOR_STATE_TRANSFER

public static final Flag PUT_FOR_STATE_TRANSFER

Flags the invocation as a put operation done internally by the state transfer. This flag was created purely for internal Infinispan usage, and should not be used by clients calling into Infinispan. Note for internal users: PUT_FOR_STATE_TRANSFER only applies to state transfer-specific actions, in order to avoid loading the previous value one should add the IGNORE_RETURN_VALUES flag explicitly.

PUT_FOR_X_SITE_STATE_TRANSFER

public static final Flag PUT_FOR_X_SITE_STATE_TRANSFER

Flags the invocation as a put operation done internally by the cross-site state transfer. This flag was created purely for internal Infinispan usage, and should not be used by clients calling into Infinispan.

SKIP_SHARED_CACHE_STORE

public static final Flag SKIP_SHARED_CACHE_STORE

If this flag is enabled, if a cache store is shared, then storage to the store is skipped.

SKIP_OWNERSHIP_CHECK

public static final Flag SKIP_OWNERSHIP_CHECK

Ignore current consistent hash and read from data container/commit the change no matter what (if the flag is set).

IGNORE_RETURN_VALUES

public static final Flag IGNORE_RETURN_VALUES

Signals that a write operation's return value will be ignored, so reading the existing value from a store or from a remote node is not necessary. Typical operations whose return value might be ignored include Map.put(Object, Object) whose return value indicates previous value. So, a user might decide to the put something in the cache but might not be interested in the return value. This flag is ignored for operations that need the existing value to execute correctly, e.g. Map.get(Object), conditional remove (ConcurrentMap.remove(Object, Object)), and replace with an expected value (ConcurrentMap.replace(Object, Object, Object)). That means it is safe to use IGNORE_RETURN_VALUES for all the operations on a cache, unlike SKIP_REMOTE_LOOKUP and SKIP_CACHE_LOAD.

SKIP_XSITE_BACKUP

public static final Flag SKIP_XSITE_BACKUP

If cross-site replication is enabled, this would skip the replication to any remote site.

SKIP_LISTENER_NOTIFICATION

public static final Flag SKIP_LISTENER_NOTIFICATION

This flag skips listener notifications as a result of a cache operation. For example, if this flag is passed as a result of a Map.get(Object) call, no callbacks will be made on listeners annotated with CacheEntryVisited.

SKIP_STATISTICS

public static final Flag SKIP_STATISTICS

This flag skips statistics updates as a result of a cache operation. For example, if this flag is passed as a result of a Map.get(Object) call, no cache hits or cache miss counters will be updated.

OPERATION_HOTROD

@Deprecated
public static final Flag OPERATION_HOTROD

Deprecated. Since 10.0, not in use.

Flag to identify cache operations coming from the Hot Rod server.

OPERATION_MEMCACHED

@Deprecated
public static final Flag OPERATION_MEMCACHED

Deprecated. Since 10.0, not in use.

Flag to identify cache operations coming from the Memcached server.

SKIP_INDEX_CLEANUP

public static final Flag SKIP_INDEX_CLEANUP

Any time a new indexed entry is inserted, a delete statement is issued on the indexes to remove previous values. This delete statement is executed even if there is no known entry having the same key. Enable this flag when you know for sure there is no existing entry in the index for improved performance. For example, this is useful for speeding up import of new data in an empty cache having an empty index.

COMMAND_RETRY

public static final Flag COMMAND_RETRY

If a write operation encounters a retry due to a topology change this flag should be used to tell the new owner that such a thing happened. This flag was created purely for internal Infinispan usage, and should not be used by clients calling into Infinispan.

ROLLING_UPGRADE

public static final Flag ROLLING_UPGRADE

Flag to identity that data is being written as part of a Rolling Upgrade.

REMOTE_ITERATION

public static final Flag REMOTE_ITERATION

Flag to identify that this iteration is done on a remote node and thus no additional wrappings are required

SKIP_SIZE_OPTIMIZATION

public static final Flag SKIP_SIZE_OPTIMIZATION

Flag that can be used to skip any size optimizations - forcing iteration of entries to count. User shouldn't normally need to use this flag. This is helpful if there are concerns that can cause just a simple size invocation from being consistent (eg. on-going transaction with modifications).

IGNORE_TRANSACTION

public static final Flag IGNORE_TRANSACTION

Flag that is used by keySet, entrySet and values methods so that they do not return transactional values. Normally an end user would not need to do this.

IRAC_UPDATE

public static final Flag IRAC_UPDATE

Signals a WriteCommand as an update from a remote site (async).

Internal use

IRAC_STATE

public static final Flag IRAC_STATE

Signals a WriteCommand as state transfer from remote site.

Internal use

ALREADY_HAS_LOCK

public static final Flag ALREADY_HAS_LOCK

Flag to designate that this operation was performed on behalf of another that already has the lock for the given key.

BACKUP_WRITE

public static final Flag BACKUP_WRITE

Signals that a WriteCommand was sent from the primary as a backup operation. Some things do not need to be checked in this case.

Method Detail

values

public static Flag[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (Flag c : Flag.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static Flag valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null