Package org.springframework.integration.metadata

Class SimpleMetadataStore

java.lang.Object

org.springframework.integration.metadata.SimpleMetadataStore

All Implemented Interfaces:

ConcurrentMetadataStore, MetadataStore

public class SimpleMetadataStore
extends Object
implements ConcurrentMetadataStore

Simple implementation of MetadataStore that uses a ConcurrentMap for the data store. The metadata may not be persisted across application restarts, if the provided ConcurrentMap is an in-memory instance.

Since:

2.0

Author:

Mark Fisher, Gary Russell, Artem Bilan

Constructor Summary

Constructors

Constructor	Description
SimpleMetadataStore()	Instantiate a SimpleMetadataStore using an in-memory ConcurrentHashMap.
SimpleMetadataStore(ConcurrentMap<String,String> metadata)	Instantiate a SimpleMetadataStore using the provided ConcurrentMap.

Method Summary

Modifier and Type	Method	Description
String	get(String key)	Reads a value for the given key from this MetadataStore.
void	put(String key, String value)	Writes a key value pair to this MetadataStore.
String	putIfAbsent(String key, String value)	Atomically insert the key into the store.
String	remove(String key)	Remove a value for the given key from this MetadataStore.
boolean	replace(String key, String oldValue, String newValue)	Atomically replace the value for the key in the store if the old value matches the oldValue argument.

Methods inherited from class java.lang.Object

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

Constructor Details

SimpleMetadataStore

public SimpleMetadataStore()

Instantiate a SimpleMetadataStore using an in-memory ConcurrentHashMap.

SimpleMetadataStore

public SimpleMetadataStore(ConcurrentMap<String,String> metadata)

Instantiate a SimpleMetadataStore using the provided ConcurrentMap. The implementation may be a distributed map provided by projects such as Redis and Hazelcast.

Parameters:

metadata - the ConcurrentMap instance for metadata.

Since:

4.1.4

Method Details

put

public void put(String key,
 String value)

Description copied from interface: MetadataStore

Writes a key value pair to this MetadataStore.

Specified by:

put in interface MetadataStore

Parameters:

key - The key.

value - The value.

get

public String get(String key)

Description copied from interface: MetadataStore

Reads a value for the given key from this MetadataStore.

Specified by:

get in interface MetadataStore

Parameters:

key - The key.

Returns:

The value.

remove

public String remove(String key)

Description copied from interface: MetadataStore

Remove a value for the given key from this MetadataStore.

Specified by:

remove in interface MetadataStore

Parameters:

key - The key.

Returns:

The previous value associated with key, or null if there was no mapping for key.

putIfAbsent

public String putIfAbsent(String key,
 String value)

Description copied from interface: ConcurrentMetadataStore

Atomically insert the key into the store.

Specified by:

putIfAbsent in interface ConcurrentMetadataStore

Parameters:

key - The key.

value - The value.

Returns:

null if successful, the old value otherwise.

replace

public boolean replace(String key,
 String oldValue,
 String newValue)

Description copied from interface: ConcurrentMetadataStore

Atomically replace the value for the key in the store if the old value matches the oldValue argument.

Specified by:

replace in interface ConcurrentMetadataStore

Parameters:

key - The key.

oldValue - The old value.

newValue - The new value.

Returns:

true if successful.