org.infinispan.loaders.cloud
Class CloudCacheStore

java.lang.Object
  org.infinispan.loaders.AbstractCacheLoader
      org.infinispan.loaders.AbstractCacheStore
          org.infinispan.loaders.LockSupportCacheStore
              org.infinispan.loaders.bucket.BucketBasedCacheStore
                  org.infinispan.loaders.cloud.CloudCacheStore

All Implemented Interfaces:

CacheLoader, CacheStore

public class CloudCacheStore
extends BucketBasedCacheStore

The CloudCacheStore implementation that utilizes JClouds to communicate with cloud storage providers such as Amazon's S3, Rackspace's Cloudfiles, or any other such provider supported by JClouds.

This file store stores stuff in the following format: http://{cloud-storage-provider}/{bucket}/{bucket_number}

Since:

4.0

Author:

Manik Surtani, Adrian Cole

Nested Class Summary

Nested classes/interfaces inherited from class org.infinispan.loaders.bucket.BucketBasedCacheStore

BucketBasedCacheStore.BucketHandler, BucketBasedCacheStore.CollectionGeneratingBucketHandler<T>

Field Summary

protected static String

EARLIEST_EXPIRY_TIME

Fields inherited from class org.infinispan.loaders.AbstractCacheStore

multiThreadedPurge, purgerService

Fields inherited from class org.infinispan.loaders.AbstractCacheLoader

cache, marshaller

Constructor Summary

CloudCacheStore()

Method Summary

void	applyModifications(List<? extends Modification> modifications)
protected void	clearLockSafe()
protected void	fromStreamLockSafe(ObjectInput objectInput)
Class<? extends CacheStoreConfig>	getConfigurationClass() This method is used by the configuration parser to get a hold of the CacheLoader implementation's corresponding CacheLoaderConfig type.
void	init(CacheLoaderConfig cfg, Cache<?,?> cache, StreamingMarshaller m) Used to initialize a cache loader.
void	init(CacheLoaderConfig cfg, Cache<?,?> cache, StreamingMarshaller m, org.jclouds.blobstore.BlobStoreContext ctx, org.jclouds.blobstore.BlobStore blobStore, org.jclouds.blobstore.AsyncBlobStore asyncBlobStore, boolean constructInternalBlobstores)
protected Bucket	loadBucket(String hash) Loads a Bucket from the store, based on the hash code of the bucket.
protected void	loopOverBuckets(BucketBasedCacheStore.BucketHandler handler) A mechanism to loop over all buckets in the cache store.
protected void	purgeInternal()
void	start()
protected boolean	supportsMultiThreadedPurge()
protected void	toStreamLockSafe(ObjectOutput objectOutput)
protected void	updateBucket(Bucket bucket) Updates a bucket in the store with the Bucket passed in to the method.

Methods inherited from class org.infinispan.loaders.bucket.BucketBasedCacheStore

getLockFromKey, insertBucket, loadAllKeysLockSafe, loadAllLockSafe, loadLockSafe, loadLockSafe, removeLockSafe, storeLockSafe

Methods inherited from class org.infinispan.loaders.LockSupportCacheStore

acquireGlobalLock, clear, fromStream, getTotalLockCount, immediateLockForWriting, load, load, loadAll, loadAllKeys, lockForReading, lockForWriting, releaseGlobalLock, remove, store, toStream, unlock

Methods inherited from class org.infinispan.loaders.AbstractCacheStore

commit, getCacheStoreConfig, getConcurrencyLevel, getMarshaller, prepare, purgeExpired, removeAll, rollback, safeClose, safeClose, stop

Methods inherited from class org.infinispan.loaders.AbstractCacheLoader

containsKey

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.infinispan.loaders.CacheLoader

containsKey

Field Detail

EARLIEST_EXPIRY_TIME

protected static final String EARLIEST_EXPIRY_TIME

See Also:

Constant Field Values

Constructor Detail

CloudCacheStore

public CloudCacheStore()

Method Detail

getConfigurationClass

public Class<? extends CacheStoreConfig> getConfigurationClass()

Description copied from interface: CacheLoader

This method is used by the configuration parser to get a hold of the CacheLoader implementation's corresponding CacheLoaderConfig type. This is usually done by instantiating the CacheLoader and then calling this method. This may result in 2 instances being created, however, since the instance created to get a hold of the configuration type is then discarded and another instance is created for actual use as a CacheLoader when the cache starts.

Since Infinispan 4.1, you can also annotate your CacheLoader implementation with CacheLoaderMetadata and provide this information via the annotation, which will prevent unnecessary instances being created.

Returns:

the type of the CacheLoaderConfig bean used to configure this implementation of CacheLoader.

supportsMultiThreadedPurge

protected boolean supportsMultiThreadedPurge()

Overrides:

supportsMultiThreadedPurge in class AbstractCacheStore

init

public void init(CacheLoaderConfig cfg,
                 Cache<?,?> cache,
                 StreamingMarshaller m)
          throws CacheLoaderException

Description copied from interface: CacheLoader

Used to initialize a cache loader. Typically invoked by the CacheLoaderManager when setting up cache loaders.

Specified by:

init in interface CacheLoader

Overrides:

init in class LockSupportCacheStore

Parameters:

cfg - the cache loader configuration bean

cache - cache associated with this cache loader. Implementations may use this to determine cache name when selecting where refer to state in storage, for example, a different database table name.

m - marshaller to use when loading state from a stream, if supported by the implementation.

Throws:

CacheLoaderException

init

public void init(CacheLoaderConfig cfg,
                 Cache<?,?> cache,
                 StreamingMarshaller m,
                 org.jclouds.blobstore.BlobStoreContext ctx,
                 org.jclouds.blobstore.BlobStore blobStore,
                 org.jclouds.blobstore.AsyncBlobStore asyncBlobStore,
                 boolean constructInternalBlobstores)
          throws CacheLoaderException

Throws:

CacheLoaderException

start

public void start()
           throws CacheLoaderException

Specified by:

start in interface CacheLoader

Overrides:

start in class LockSupportCacheStore

Throws:

CacheLoaderException

loopOverBuckets

protected void loopOverBuckets(BucketBasedCacheStore.BucketHandler handler)
                        throws CacheLoaderException

Description copied from class: BucketBasedCacheStore

A mechanism to loop over all buckets in the cache store. Implementations should, very simply, loop over all available buckets, and for each deserialized bucket, pass it to the handler.

The implementation is expected to loop over all available buckets (in any order), until BucketBasedCacheStore.BucketHandler.handle(Bucket) returns true or there are no more buckets available.

Specified by:

loopOverBuckets in class BucketBasedCacheStore

Throws:

CacheLoaderException

fromStreamLockSafe

protected void fromStreamLockSafe(ObjectInput objectInput)
                           throws CacheLoaderException

Specified by:

fromStreamLockSafe in class LockSupportCacheStore

Throws:

CacheLoaderException

toStreamLockSafe

protected void toStreamLockSafe(ObjectOutput objectOutput)
                         throws CacheLoaderException

Specified by:

toStreamLockSafe in class LockSupportCacheStore

Throws:

CacheLoaderException

clearLockSafe

protected void clearLockSafe()

Specified by:

clearLockSafe in class LockSupportCacheStore

loadBucket

protected Bucket loadBucket(String hash)
                     throws CacheLoaderException

Description copied from class: BucketBasedCacheStore

Loads a Bucket from the store, based on the hash code of the bucket.

Specified by:

loadBucket in class BucketBasedCacheStore

Parameters:

hash - String representation of the Bucket's hash

Returns:

a Bucket if one exists, null otherwise.

Throws:

CacheLoaderException - in case of problems with the store.

purgeInternal

protected void purgeInternal()
                      throws CacheLoaderException

Specified by:

purgeInternal in class AbstractCacheStore

Throws:

CacheLoaderException

updateBucket

protected void updateBucket(Bucket bucket)
                     throws CacheLoaderException

Description copied from class: BucketBasedCacheStore

Updates a bucket in the store with the Bucket passed in to the method. This method assumes that the bucket already exists in the store, however some implementations may choose to simply create a new bucket if the bucket does not exist.

The default behavior is that non-existent buckets are created on the fly. If this is not the case in your implementation, then you would have to override BucketBasedCacheStore.insertBucket(Bucket) as well so that it doesn't blindly forward calls to BucketBasedCacheStore.updateBucket(Bucket).

Specified by:

updateBucket in class BucketBasedCacheStore

Parameters:

bucket - bucket to update.

Throws:

CacheLoaderException - in case of problems with the store.

applyModifications

public void applyModifications(List<? extends Modification> modifications)
                        throws CacheLoaderException

Overrides:

applyModifications in class AbstractCacheStore

Throws:

CacheLoaderException