Package com.atlassian.bamboo.core

Class ScopedExclusionServiceImpl

java.lang.Object

com.atlassian.bamboo.core.ScopedExclusionServiceImpl

All Implemented Interfaces:

ScopedExclusionService

public class ScopedExclusionServiceImpl
extends Object
implements ScopedExclusionService

Nested Class Summary

Nested classes/interfaces inherited from interface com.atlassian.bamboo.core.ScopedExclusionService

ScopedExclusionService.ExclusionScopeType, ScopedExclusionService.ExclusiveFunction<F,V,E extends Throwable>, ScopedExclusionService.GeneratorCallable<V,E extends Throwable>

Constructor Summary

Constructors

Constructor	Description
ScopedExclusionServiceImpl()

Method Summary

Modifier and Type	Method	Description
<S,V,E extends Throwable> io.atlassian.fugue.Either<Boolean,Optional<V>>	tryWithLock(@NotNull Enum<?> scopeType, S objectToLock, @NotNull ScopedExclusionService.ExclusiveFunction<S,V,E> function)	Executes function with lock taken in a given scope and object name or returns immediately if lock is already taken.
static <T> com.google.common.cache.LoadingCache<T,ReadWriteLock>	weakReadWriteLockFactory()
<S,V,E extends Throwable> V	withLock(@NotNull Enum<?> scopeType, S objectToLock, @NotNull ScopedExclusionService.ExclusiveFunction<S,V,E> function)	Executes function with lock taken in a given scope and object name.
<S,V,E extends Throwable,F extends Throwable> V	withNewLockedObject(@NotNull Enum<?> generationScopeType, S objectToLockDuringGeneration, @Nullable Enum<?> generatedObjectScope, @NotNull ScopedExclusionService.GeneratorCallable<S,F> objectGenerator, @NotNull ScopedExclusionService.ExclusiveFunction<S,V,E> function)	Executes code with a new, unique name generated within given exclusion scope and locked for exclusive use.

Methods inherited from class java.lang.Object

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

Constructor Detail

ScopedExclusionServiceImpl

public ScopedExclusionServiceImpl()

Method Detail

weakReadWriteLockFactory

public static <T> com.google.common.cache.LoadingCache<T,ReadWriteLock> weakReadWriteLockFactory()

withNewLockedObject

public <S,V,E extends Throwable,F extends Throwable> V withNewLockedObject(@NotNull
                                                                                             @NotNull Enum<?> generationScopeType,
                                                                                             @Nullable
                                                                                             S objectToLockDuringGeneration,
                                                                                             @Nullable
                                                                                             @Nullable Enum<?> generatedObjectScope,
                                                                                             @NotNull
                                                                                             @NotNull ScopedExclusionService.GeneratorCallable<S,F> objectGenerator,
                                                                                             @NotNull
                                                                                             @NotNull ScopedExclusionService.ExclusiveFunction<S,V,E> function)
                                                                                      throws E extends Throwable,
                                                                                             F extends Throwable

Description copied from interface: ScopedExclusionService

Executes code with a new, unique name generated within given exclusion scope and locked for exclusive use. Objects to lock are generated by objectGenerator. If the generated object is already locked, the generator will be asked for a new object. The whole generation (including all unsuccesful lock attempts) will be run with an exclusive lock held on objectToLockDuringGeneration within generationScope. As soon as a valid object, locked within generatedObjectScope is generated: - other generations within the same scope may continue and - the function will be called. - the generation lock is dropped

Specified by:

withNewLockedObject in interface ScopedExclusionService

Throws:

E extends Throwable

withLock

public <S,V,E extends Throwable> V withLock(@NotNull
                                                        @NotNull Enum<?> scopeType,
                                                        @NotNull
                                                        S objectToLock,
                                                        @NotNull
                                                        @NotNull ScopedExclusionService.ExclusiveFunction<S,V,E> function)
                                                 throws E extends Throwable

Description copied from interface: ScopedExclusionService

Executes function with lock taken in a given scope and object name.

Specified by:

withLock in interface ScopedExclusionService

Parameters:

scopeType - type of scope (if we wanted to lock a Job, this would be JOB_KEY - jobs are locked by key)

objectToLock - object to lock within scope (if we wanted to lock a Job, this would be job key)

function - the function to call

Returns:

the result of function

Throws:

E - exception thrown from function

E extends Throwable

tryWithLock

public <S,V,E extends Throwable> io.atlassian.fugue.Either<Boolean,Optional<V>> tryWithLock(@NotNull
                                                                                                              @NotNull Enum<?> scopeType,
                                                                                                              @NotNull
                                                                                                              S objectToLock,
                                                                                                              @NotNull
                                                                                                              @NotNull ScopedExclusionService.ExclusiveFunction<S,V,E> function)
                                                                                                       throws E extends Throwable

Description copied from interface: ScopedExclusionService

Executes function with lock taken in a given scope and object name or returns immediately if lock is already taken.

Specified by:

tryWithLock in interface ScopedExclusionService

Parameters:

scopeType - type of scope (if we wanted to lock a Job, this would be JOB_KEY - jobs are locked by key)

objectToLock - object to lock within scope (if we wanted to lock a Job, this would be job key)

function - the function to call

Returns:

either the result of function or false if the lock could not be acquired

Throws:

E - exception thrown from function

E extends Throwable