CachingContentStore handles "spoof://" content URLs (ACE-4516:DataLoad file spoofing fails with S3 connector)

- Any store can now be used with the spoofed data load by wrapping it in the CachingContentStore (see S3 Connector)
 - Will work with S3 Connector against Alfresco 5.1


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@115382 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/content/caching/CachingContentStore.java

@@ -27,6 +27,8 @@ import org.alfresco.repo.content.ContentContext;
 import org.alfresco.repo.content.ContentStore;
 import org.alfresco.repo.content.caching.quota.QuotaManagerStrategy;
 import org.alfresco.repo.content.caching.quota.UnlimitedQuotaStrategy;
+import org.alfresco.repo.content.filestore.FileContentStore;
+import org.alfresco.repo.content.filestore.SpoofedTextContentReader;
 import org.alfresco.service.cmr.repository.ContentIOException;
 import org.alfresco.service.cmr.repository.ContentReader;
 import org.alfresco.service.cmr.repository.ContentStreamListener;
@@ -46,6 +48,9 @@ import org.springframework.context.ApplicationEventPublisherAware;
  * slower that FileContentStore - otherwise performance may actually degrade from its use.
  * <p>
  * It is important that cacheOnInbound is set to true for exceptionally slow backing stores.
+ * <p>
+ * This store handles the {@link FileContentStore#SPOOF_PROTOCOL} and can be used to wrap stores
+ * that do not handle the protocol out of the box e.g. the S3 connector's store.
  * 
  * @author Matt Ward
  */
@@ -121,15 +126,39 @@ public class CachingContentStore implements ContentStore, ApplicationEventPublis
         return backingStore.getRootLocation();
     }
 
+    /**
+     * {@inheritDoc}
+     * <p>
+     * For {@link #SPOOF_PROTOCOL spoofed} URLs, the URL always exists.
+     */
     @Override
     public boolean exists(String contentUrl)
     {
-        return backingStore.exists(contentUrl);
+        if (contentUrl.startsWith(FileContentStore.SPOOF_PROTOCOL))
+        {
+            return true;
+        }
+        else
+        {
+            return backingStore.exists(contentUrl);
+        }
     }
 
+    /**
+     * {@inheritDoc}
+     * <p>
+     * This store handles the {@link FileContentStore#SPOOF_PROTOCOL} so that underlying stores do not need
+     * to implement anything <a href="https://issues.alfresco.com/jira/browse/ACE-4516">related to spoofing</a>.
+     */
     @Override
     public ContentReader getReader(String contentUrl)
     {
+        // Handle the spoofed URL
+        if (contentUrl.startsWith(FileContentStore.SPOOF_PROTOCOL))
+        {
+            return new SpoofedTextContentReader(contentUrl);
+        }
+
         // Use pool of locks - which one is determined by a hash of the URL.
         // This will stop the content from being read/cached multiple times from the backing store
         // when it should only be read once - cached versions should be returned after that.
@@ -317,6 +346,12 @@ public class CachingContentStore implements ContentStore, ApplicationEventPublis
     @Override
     public boolean delete(String contentUrl)
     {
+        if (contentUrl.startsWith(FileContentStore.SPOOF_PROTOCOL))
+        {
+            // This is not a failure but the content can never actually be deleted
+            return false;
+        }
+
         ReentrantReadWriteLock readWriteLock = readWriteLock(contentUrl);
         ReadLock readLock = readWriteLock.readLock();
         readLock.lock();

source/java/org/alfresco/repo/content/filestore/FileContentStore.java

@@ -429,7 +429,7 @@ public class FileContentStore
 
     /**
      * This implementation requires that the URL start with
-     * {@link FileContentStore#STORE_PROTOCOL }.
+     * {@link FileContentStore#STORE_PROTOCOL } or {@link FileContentStore#SPOOF_PROTOCOL }
      */
     public ContentReader getReader(String contentUrl)
     {