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java.lang.Object org.jboss.cache.loader.AbstractCacheLoader org.jboss.cache.loader.jdbm.JdbmCacheLoader
@ThreadSafe public class JdbmCacheLoader
A persistent CacheLoader
based on the JDBM project.
See http://jdbm.sourceforge.net/ .
Does not support transaction isolation.
The configuration string format is:
environmentDirectoryName[#databaseName]
where databaseName, if omitted, defaults to the ClusterName property of the CacheImpl.
Data is sorted out like:/ = N /node1 = N /node1/K/k1 = v1 /node1/K/k2 = v2 /node2 = N /node2/node3 = N /node2/node3/K/k1 = v1 /node2/node3/K/k2 = v2 /node2/node4 = NN represents a node, K represents a key block. k and v represent key/value pairs. The browse operations lock the entire tree; eventually the JDBM team plans to fix this.
Field Summary |
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Fields inherited from class org.jboss.cache.loader.AbstractCacheLoader |
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cache, regionManager, transactions |
Constructor Summary | |
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JdbmCacheLoader()
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Method Summary | |
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void |
create()
Lifecycle method, called when the cache loader is created. |
void |
dump()
Dumps the tree to debug. |
void |
dump(Object key)
Dumps the tree past the key to debug. |
boolean |
exists(Fqn name)
Returns whether the given node exists. |
Map |
get(Fqn name)
Returns a map containing all key-value pairs for the given FQN, or null if the node is not present. |
Set<String> |
getChildrenNames(Fqn name)
Returns an unmodifiable set of relative children names, or returns null if the parent node is not found or if no children are found. |
CacheLoaderConfig.IndividualCacheLoaderConfig |
getConfig()
Gets the configuration. |
void |
put(Fqn name,
Map values)
Stores a map of key-values for a given FQN, but does not delete existing key-value pairs (that is, it does not erase). |
Object |
put(Fqn name,
Object key,
Object value)
Stores a single FQN-key-value record. |
void |
put(List<Modification> modifications)
Applies the given modifications. |
void |
remove(Fqn name)
Deletes the node for a given FQN and all its descendent nodes. |
Object |
remove(Fqn name,
Object key)
Deletes a single FQN-key-value record. |
void |
removeData(Fqn name)
Clears the map for the given node, but does not remove the node. |
void |
setCache(CacheSPI c)
Sets the CacheImpl owner of this cache loader. |
void |
setConfig(CacheLoaderConfig.IndividualCacheLoaderConfig base)
Sets the configuration string for this cache loader. |
void |
start()
Opens the environment and the database specified by the configuration string. |
void |
stop()
Closes the databases and environment, and nulls references to them. |
String |
toString()
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Methods inherited from class org.jboss.cache.loader.AbstractCacheLoader |
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commit, destroy, doMarshall, doUnmarshall, getMarshaller, getNodeDataList, loadEntireState, loadState, loadStateHelper, prepare, put, regionAwareMarshall, regionAwareUnmarshall, rollback, setRegionManager, storeEntireState, storeState |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public JdbmCacheLoader()
Method Detail |
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public void create() throws Exception
CacheLoader
create
in interface CacheLoader
create
in class AbstractCacheLoader
Exception
public void start() throws Exception
start
in interface CacheLoader
start
in class AbstractCacheLoader
Exception
public void stop()
stop
in interface CacheLoader
stop
in class AbstractCacheLoader
public void setConfig(CacheLoaderConfig.IndividualCacheLoaderConfig base)
base
- May be an instance of the CacheLoaderConfig.IndividualCacheLoaderConfig
base
class, in which case the cache loader should use the
CacheLoaderConfig.IndividualCacheLoaderConfig.getProperties()
method to find configuration information. Alternatively,
may be a type-specific subclass of CacheLoaderConfig.IndividualCacheLoaderConfig
,
if there is one.public CacheLoaderConfig.IndividualCacheLoaderConfig getConfig()
CacheLoader
CacheLoaderConfig.IndividualCacheLoaderConfig
object.public void setCache(CacheSPI c)
setCache
in interface CacheLoader
setCache
in class AbstractCacheLoader
c
- The cache on which this loader workspublic Set<String> getChildrenNames(Fqn name) throws Exception
name
- The Fqn
of the parent
Exception
public Map get(Fqn name) throws Exception
name
- the Fqn
to search for.
public boolean exists(Fqn name) throws IOException
IOException
public Object put(Fqn name, Object key, Object value) throws Exception
Exception
public void put(Fqn name, Map values) throws Exception
name
- The fully qualified name of the nodevalues
- A Map of attributes. Can be null
Exception
public void put(List<Modification> modifications) throws Exception
put
in interface CacheLoader
put
in class AbstractCacheLoader
modifications
- A ListException
public void remove(Fqn name) throws Exception
name
- the Fqn
of the node
Exception
public Object remove(Fqn name, Object key) throws Exception
Exception
public void removeData(Fqn name) throws Exception
name
- the Fqn
of the node
Exception
public void dump() throws IOException
IOException
public void dump(Object key) throws IOException
IOException
public String toString()
toString
in class Object
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