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Merge pull request #612 from andrewgaul/transient-storage-strategy 

Introduce TransientStorageStrategy
This commit is contained in:
Adrian Cole 2012-05-07 17:14:10 -07:00
parent 00e28b9910 442c51eb3c
commit 39e6f84f4b
3 changed files with 57 additions and 37 deletions
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25
apis/filesystem/src/main/java/org/jclouds/filesystem/FilesystemAsyncBlobStore.java
View File

@ -148,7 +148,7 @@ public class FilesystemAsyncBlobStore extends BaseAsyncBlobStore {
public ListenableFuture<PageSet<? extends StorageMetadata>> list(final String container, ListContainerOptions options) {
// Check if the container exists
if (!containerExistsSyncImpl(container))
if (!storageStrategy.containerExists(container))
return immediateFailedFuture(cnfe(container));
// Loading blobs from container
@ -242,7 +242,9 @@ public class FilesystemAsyncBlobStore extends BaseAsyncBlobStore {
}
private ContainerNotFoundException cnfe(final String name) {
return new ContainerNotFoundException(name, String.format("container %s not in filesystem", name));
return new ContainerNotFoundException(name, String.format(
"container %s not in %s", name,
storageStrategy.getAllContainerNames()));
}
public static MutableBlobMetadata copy(MutableBlobMetadata in) {
@ -304,7 +306,7 @@ public class FilesystemAsyncBlobStore extends BaseAsyncBlobStore {
*/
@Override
public ListenableFuture<Boolean> containerExists(final String containerName) {
return immediateFuture(containerExistsSyncImpl(containerName));
return immediateFuture(storageStrategy.containerExists(containerName));
}
/**
@ -503,6 +505,8 @@ public class FilesystemAsyncBlobStore extends BaseAsyncBlobStore {
*/
@Override
public ListenableFuture<Boolean> blobExists(final String containerName, final String key) {
if (!storageStrategy.containerExists(containerName))
return immediateFailedFuture(cnfe(containerName));
return immediateFuture(storageStrategy.blobExists(containerName, key));
}
@ -513,7 +517,7 @@ public class FilesystemAsyncBlobStore extends BaseAsyncBlobStore {
public ListenableFuture<Blob> getBlob(final String containerName, final String key, GetOptions options) {
logger.debug("Retrieving blob with key %s from container %s", key, containerName);
// If the container doesn't exist, an exception is thrown
if (!containerExistsSyncImpl(containerName)) {
if (!storageStrategy.containerExists(containerName)) {
logger.debug("Container %s does not exist", containerName);
return immediateFailedFuture(cnfe(containerName));
}
@ -601,17 +605,6 @@ public class FilesystemAsyncBlobStore extends BaseAsyncBlobStore {
}
}
/**
* Each container is a directory, so in order to check if a container exists
* the corresponding directory must exists. Synchronous implementation
*
* @param containerName
* @return
*/
private boolean containerExistsSyncImpl(String containerName) {
return storageStrategy.containerExists(containerName);
}
/**
* Calculates the object MD5 and returns it as eTag
*
@ -633,7 +626,7 @@ public class FilesystemAsyncBlobStore extends BaseAsyncBlobStore {
@Override
protected boolean deleteAndVerifyContainerGone(final String container) {
storageStrategy.deleteContainer(container);
return containerExistsSyncImpl(container);
return storageStrategy.containerExists(container);
}
@Override

8
apis/filesystem/src/test/java/org/jclouds/filesystem/FilesystemAsyncBlobStoreTest.java
View File

@ -565,8 +565,12 @@ public class FilesystemAsyncBlobStoreTest {
// when location doesn't exists
blobKey = TestUtils.createRandomBlobKey();
result = blobStore.blobExists(CONTAINER_NAME, blobKey);
assertFalse(result, "Blob exists");
try {
blobStore.blobExists(CONTAINER_NAME, blobKey);
fail();
} catch (ContainerNotFoundException cnfe) {
// expected
}
// when location exists
blobStore.createContainerInLocation(null, CONTAINER_NAME);

61
blobstore/src/main/java/org/jclouds/blobstore/TransientAsyncBlobStore.java
View File

@ -128,6 +128,7 @@ public class TransientAsyncBlobStore extends BaseAsyncBlobStore {
protected final HttpGetOptionsListToGetOptions httpGetOptionsConverter;
protected final IfDirectoryReturnNameStrategy ifDirectoryReturnName;
protected final Factory blobFactory;
protected final TransientStorageStrategy storageStrategy;
@Inject
protected TransientAsyncBlobStore(BlobStoreContext context,
@ -152,6 +153,7 @@ public class TransientAsyncBlobStore extends BaseAsyncBlobStore {
this.ifDirectoryReturnName = ifDirectoryReturnName;
getContainerToLocation().put("stub", defaultLocation.get());
getContainerToBlobs().put("stub", new ConcurrentHashMap<String, Blob>());
this.storageStrategy = new TransientStorageStrategy();
}
/**
@ -246,8 +248,9 @@ public class TransientAsyncBlobStore extends BaseAsyncBlobStore {
}
private ContainerNotFoundException cnfe(final String name) {
return new ContainerNotFoundException(name, String.format("container %s not in %s", name, getContainerToBlobs()
.keySet()));
return new ContainerNotFoundException(name, String.format(
"container %s not in %s", name,
storageStrategy.getAllContainerNames()));
}
public static MutableBlobMetadata copy(MutableBlobMetadata in) {
@ -285,9 +288,7 @@ public class TransientAsyncBlobStore extends BaseAsyncBlobStore {
*/
@Override
public ListenableFuture<Void> removeBlob(final String container, final String key) {
if (getContainerToBlobs().containsKey(container)) {
getContainerToBlobs().get(container).remove(key);
}
storageStrategy.removeBlob(container, key);
return immediateFuture(null);
}
@ -305,17 +306,15 @@ public class TransientAsyncBlobStore extends BaseAsyncBlobStore {
*/
@Override
public ListenableFuture<Void> deleteContainer(final String container) {
if (getContainerToBlobs().containsKey(container)) {
getContainerToBlobs().remove(container);
}
deleteAndVerifyContainerGone(container);
return immediateFuture(null);
}
public ListenableFuture<Boolean> deleteContainerIfEmpty(final String container) {
Boolean returnVal = true;
if (getContainerToBlobs().containsKey(container)) {
if (storageStrategy.containerExists(container)) {
if (getContainerToBlobs().get(container).size() == 0)
getContainerToBlobs().remove(container);
storageStrategy.deleteContainer(container);
else
returnVal = false;
}
@ -327,7 +326,7 @@ public class TransientAsyncBlobStore extends BaseAsyncBlobStore {
*/
@Override
public ListenableFuture<Boolean> containerExists(final String containerName) {
return immediateFuture(getContainerToBlobs().containsKey(containerName));
return immediateFuture(storageStrategy.containerExists(containerName));
}
/**
@ -335,7 +334,7 @@ public class TransientAsyncBlobStore extends BaseAsyncBlobStore {
*/
@Override
public ListenableFuture<PageSet<? extends StorageMetadata>> list() {
Iterable<String> containers = getContainerToBlobs().keySet();
Iterable<String> containers = storageStrategy.getAllContainerNames();
return Futures.<PageSet<? extends StorageMetadata>> immediateFuture(new PageSetImpl<StorageMetadata>(transform(
containers, new Function<String, StorageMetadata>() {
@ -358,7 +357,7 @@ public class TransientAsyncBlobStore extends BaseAsyncBlobStore {
*/
@Override
public ListenableFuture<Boolean> createContainerInLocation(final Location location, final String name) {
if (getContainerToBlobs().containsKey(name)) {
if (storageStrategy.containerExists(name)) {
return immediateFuture(Boolean.FALSE);
}
getContainerToBlobs().put(name, new ConcurrentHashMap<String, Blob>());
@ -542,10 +541,9 @@ public class TransientAsyncBlobStore extends BaseAsyncBlobStore {
*/
@Override
public ListenableFuture<Boolean> blobExists(final String containerName, final String key) {
if (!getContainerToBlobs().containsKey(containerName))
if (!storageStrategy.containerExists(containerName))
return immediateFailedFuture(cnfe(containerName));
Map<String, Blob> realContents = getContainerToBlobs().get(containerName);
return immediateFuture(realContents.containsKey(key));
return immediateFuture(storageStrategy.blobExists(containerName, key));
}
/**
@ -555,7 +553,7 @@ public class TransientAsyncBlobStore extends BaseAsyncBlobStore {
public ListenableFuture<Blob> getBlob(final String containerName, final String key, GetOptions options) {
logger.debug("Retrieving blob with key %s from container %s", key, containerName);
// If the container doesn't exist, an exception is thrown
if (!getContainerToBlobs().containsKey(containerName)) {
if (!storageStrategy.containerExists(containerName)) {
logger.debug("Container %s does not exist", containerName);
return immediateFailedFuture(cnfe(containerName));
}
@ -660,8 +658,8 @@ public class TransientAsyncBlobStore extends BaseAsyncBlobStore {
@Override
protected boolean deleteAndVerifyContainerGone(final String container) {
getContainerToBlobs().remove(container);
return getContainerToBlobs().containsKey(container);
storageStrategy.deleteContainer(container);
return storageStrategy.containerExists(container);
}
private ConcurrentMap<String, Location> getContainerToLocation() {
@ -681,4 +679,29 @@ public class TransientAsyncBlobStore extends BaseAsyncBlobStore {
throw new UnsupportedOperationException("publicRead");
return createContainerInLocation(location, container);
}
private class TransientStorageStrategy {
public Iterable<String> getAllContainerNames() {
return getContainerToBlobs().keySet();
}
public boolean containerExists(final String containerName) {
return getContainerToBlobs().containsKey(containerName);
}
public void deleteContainer(final String containerName) {
getContainerToBlobs().remove(containerName);
}
public boolean blobExists(final String containerName, final String blobName) {
Map<String, Blob> map = containerToBlobs.get(containerName);
return map != null && map.containsKey(blobName);
}
public void removeBlob(final String containerName, final String blobName) {
if (storageStrategy.containerExists(containerName)) {
getContainerToBlobs().get(containerName).remove(blobName);
}
}
}
}