Class SimpleResourceHolder
- java.lang.Object
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- org.springframework.amqp.rabbit.connection.SimpleResourceHolder
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public final class SimpleResourceHolder extends Object
Central helper that manages resources per thread to be used by resource management code.bind(Object, Object)supports one resource per key without overwriting, that is, a resource needs to be removed before a new one can be set for the same key. But seepush(Object, Object)andpop(Object).Resource management code should check for thread-bound resources via
has(Object).This helper isn't designed for transaction synchronization cases. Use
TransactionSynchronizationManagerandResourceHolderinstead.- Since:
- 1.3
- Author:
- Artem Bilan, Gary Russell
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static voidbind(Object key, Object value)Bind the given resource for the given key to the current thread.static voidclear()Clear resources for the current thread.static Objectget(Object key)Retrieve a resource for the given key that is bound to the current thread.static Map<Object,Object>getResources()Return all resources that are bound to the current thread.static booleanhas(Object key)Check if there is a resource for the given key bound to the current thread.static Objectpop(Object key)Unbind the current value and bind the head of the stack if present.static voidpush(Object key, Object value)Set the value for this key and push any existing value onto a stack.static Objectunbind(Object key)Unbind a resource for the given key from the current thread.static ObjectunbindIfPossible(Object key)Unbind a resource for the given key from the current thread.
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Method Detail
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getResources
public static Map<Object,Object> getResources()
Return all resources that are bound to the current thread.Mainly for debugging purposes. Resource managers should always invoke
hasResourcefor a specific resource key that they are interested in.- Returns:
- a Map with resource keys (usually the resource factory) and resource values (usually the active resource object), or an empty Map if there are currently no resources bound
- See Also:
has(java.lang.Object)
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has
public static boolean has(Object key)
Check if there is a resource for the given key bound to the current thread.- Parameters:
key- the key to check (usually the resource factory)- Returns:
- if there is a value bound to the current thread
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get
@Nullable public static Object get(Object key)
Retrieve a resource for the given key that is bound to the current thread.- Parameters:
key- the key to check (usually the resource factory)- Returns:
- a value bound to the current thread (usually the active
resource object), or
nullif none
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bind
public static void bind(Object key, Object value)
Bind the given resource for the given key to the current thread.- Parameters:
key- the key to bind the value to (usually the resource factory)value- the value to bind (usually the active resource object)- Throws:
IllegalStateException- if there is already a value bound to the thread
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push
public static void push(Object key, Object value)
Set the value for this key and push any existing value onto a stack.- Parameters:
key- the key.value- the value.- Since:
- 2.1.11
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pop
@Nullable public static Object pop(Object key)
Unbind the current value and bind the head of the stack if present.- Parameters:
key- the key.- Returns:
- the popped value.
- Since:
- 2.1.11
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unbind
public static Object unbind(Object key) throws IllegalStateException
Unbind a resource for the given key from the current thread.- Parameters:
key- the key to unbind (usually the resource factory)- Returns:
- the previously bound value (usually the active resource object)
- Throws:
IllegalStateException- if there is no value bound to the thread
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unbindIfPossible
@Nullable public static Object unbindIfPossible(Object key)
Unbind a resource for the given key from the current thread.- Parameters:
key- the key to unbind (usually the resource factory)- Returns:
- the previously bound value, or
nullif none bound
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clear
public static void clear()
Clear resources for the current thread.
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