| java.lang.Object
 com.tc.object.config.ConfigLockLevel
| ConfigLockLevel | | public class ConfigLockLevel (Code) | | Describe a lock level from a set of enumerated values. Use the static constants or
the static factory method
ConfigLockLevel.lockLevelByName(String) to get an instance. There are
8 types of locks defined in the config - these can all be applied to auto locks, but
only the ones without AUTO_SYNCHRONIZED prefix can be used with named locks.
From a concurrency perspective, there are four levels of locking that allow different
amounts of access to a section:
- WRITE - like Java synchronized sections - only one thread in the cluster may enter
- READ - allow either one writer or multiple readers at any given time
- CONCURRENT - perform no locking, but serve to mark memory transaction boundaries
- SYNCHRONOUS_WRITE - like WRITE but do not commit until the data has been saved to disk
In addition, for autolocks, there is an extra attribute called "auto-synhcronized" that indicates
that the method should be made synchronized before auto-locking. This is useful in code you don't have
control over that needs to be be made synchronized for use in a clustered environment.
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| AUTO_SYNCHRONIZED_CONCURRENT | | final public static ConfigLockLevel AUTO_SYNCHRONIZED_CONCURRENT(Code) | | CONCURRENT lock, auto-synchronize=false
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| AUTO_SYNCHRONIZED_CONCURRENT_NAME | | final static String AUTO_SYNCHRONIZED_CONCURRENT_NAME(Code) | | |
| AUTO_SYNCHRONIZED_READ | | final public static ConfigLockLevel AUTO_SYNCHRONIZED_READ(Code) | | READ lock, auto-synchronize=false
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| AUTO_SYNCHRONIZED_READ_NAME | | final static String AUTO_SYNCHRONIZED_READ_NAME(Code) | | |
| AUTO_SYNCHRONIZED_SYNCHRONOUS_WRITE | | final public static ConfigLockLevel AUTO_SYNCHRONIZED_SYNCHRONOUS_WRITE(Code) | | SYNCHRONOUS_WRITE lock, auto-synchronize=false
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| AUTO_SYNCHRONIZED_SYNCHRONOUS_WRITE_NAME | | final static String AUTO_SYNCHRONIZED_SYNCHRONOUS_WRITE_NAME(Code) | | |
| AUTO_SYNCHRONIZED_WRITE | | final public static ConfigLockLevel AUTO_SYNCHRONIZED_WRITE(Code) | | WRITE lock, auto-synchronize=true
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| AUTO_SYNCHRONIZED_WRITE_NAME | | final static String AUTO_SYNCHRONIZED_WRITE_NAME(Code) | | |
| SYNCHRONOUS_WRITE | | final public static ConfigLockLevel SYNCHRONOUS_WRITE(Code) | | SYNCHRONOUS_WRITE lock, auto-synchronize=false
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| SYNCHRONOUS_WRITE_NAME | | final static String SYNCHRONOUS_WRITE_NAME(Code) | | |
| getLevel | | public int getLevel()(Code) | | Ordinal lock level value |
| lockLevelByName | | public static ConfigLockLevel lockLevelByName(String typeName)(Code) | | Provide an instance of the constant for the specified name
or null if name is invalid
Parameters:
typeName - Lock level name Lock level instance |
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