Package org.springframework.integration.mongodb.metadata

Class MongoDbMetadataStore

java.lang.Object

org.springframework.integration.mongodb.metadata.MongoDbMetadataStore

All Implemented Interfaces:

ConcurrentMetadataStore, MetadataStore

public class MongoDbMetadataStore
extends Object
implements ConcurrentMetadataStore

MongoDbMetadataStore implementation of ConcurrentMetadataStore. Use this MetadataStore to achieve meta-data persistence shared across application instances and restarts.

Since:

4.2

Author:

Senthil Arumugam, Samiraj Panneer Selvam, Artem Bilan, Gary Russell

Constructor Summary

Constructors

Constructor	Description
MongoDbMetadataStore(MongoTemplate template)	Configure the MongoDbMetadataStore by provided MongoTemplate and default collection name - DEFAULT_COLLECTION_NAME.
MongoDbMetadataStore(MongoTemplate template, String collectionName)	Configure the MongoDbMetadataStore by provided MongoTemplate and collection name.
MongoDbMetadataStore(MongoDatabaseFactory factory)	Configure the MongoDbMetadataStore by provided MongoDatabaseFactory and default collection name - DEFAULT_COLLECTION_NAME.
MongoDbMetadataStore(MongoDatabaseFactory factory, String collectionName)	Configure the MongoDbMetadataStore by provided MongoDatabaseFactory and collection name.

Method Summary

Modifier and Type	Method	Description
String	get(String key)	Get the value for the provided key performing findOne MongoDB operation.
void	put(String key, String value)	Store a metadata value under provided key to the configured collectionName.
String	putIfAbsent(String key, String value)	If the specified key is not already associated with a value, associate it with the given value.
String	remove(String key)	Remove the metadata entry for the provided key and return its value, if any, using findAndRemove MongoDB operation.
boolean	replace(String key, String oldValue, String newValue)	Replace an existing metadata entry value with a new one.

Methods inherited from class java.lang.Object

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

Constructor Details

MongoDbMetadataStore

public MongoDbMetadataStore(MongoDatabaseFactory factory)

Configure the MongoDbMetadataStore by provided MongoDatabaseFactory and default collection name - DEFAULT_COLLECTION_NAME.

Parameters:

factory - the mongodb factory

MongoDbMetadataStore

public MongoDbMetadataStore(MongoDatabaseFactory factory,
 String collectionName)

Configure the MongoDbMetadataStore by provided MongoDatabaseFactory and collection name.

Parameters:

factory - the mongodb factory

collectionName - the collection name where it persists the data

MongoDbMetadataStore

public MongoDbMetadataStore(MongoTemplate template)

Configure the MongoDbMetadataStore by provided MongoTemplate and default collection name - DEFAULT_COLLECTION_NAME.

Parameters:

template - the mongodb template

MongoDbMetadataStore

public MongoDbMetadataStore(MongoTemplate template,
 String collectionName)

Configure the MongoDbMetadataStore by provided MongoTemplate and collection name.

Parameters:

template - the mongodb template

collectionName - the collection name where it persists the data

Method Details

put

public void put(String key,
 String value)

Store a metadata value under provided key to the configured collectionName.

If a document does not exist with the specified key, the method performs an insert. If a document exists with the specified key, the method performs an update.

Specified by:

put in interface MetadataStore

Parameters:

key - the metadata entry key

value - the metadata entry value

See Also:

• MongoTemplate.execute(String, org.springframework.data.mongodb.core.CollectionCallback)

get

public String get(String key)

Get the value for the provided key performing findOne MongoDB operation.

Specified by:

get in interface MetadataStore

Parameters:

key - the metadata entry key

Returns:

the metadata entry value or null if doesn't exist.

See Also:

• MongoTemplate.findOne(Query, Class, String)

remove

public String remove(String key)

Remove the metadata entry for the provided key and return its value, if any, using findAndRemove MongoDB operation.

Specified by:

remove in interface MetadataStore

Parameters:

key - the metadata entry key

Returns:

the metadata entry value or null if doesn't exist.

See Also:

• MongoTemplate.findAndRemove(Query, Class, String)

putIfAbsent

public String putIfAbsent(String key,
 String value)

If the specified key is not already associated with a value, associate it with the given value. This is equivalent to

 
 if (!map.containsKey(key))
   return map.put(key, value);
 else
   return map.get(key);
 

except that the action is performed atomically.

Specified by:

putIfAbsent in interface ConcurrentMetadataStore

Parameters:

key - the metadata entry key

value - the metadata entry value to store

Returns:

null if successful, the old value otherwise.

See Also:

• ConcurrentMap.putIfAbsent(Object, Object)

replace

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

Replace an existing metadata entry value with a new one. Otherwise does nothing. Performs updateFirst if a document for the provided key and oldValue exists in the collectionName.

Specified by:

replace in interface ConcurrentMetadataStore

Parameters:

key - the metadata entry key

oldValue - the metadata entry old value to replace

newValue - the metadata entry new value to put

Returns:

true if replace was successful, false otherwise.

See Also:

• MongoTemplate.updateFirst(Query, org.springframework.data.mongodb.core.query.UpdateDefinition, String)