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https://issues.apache.org/jira/browse/STORM-876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14988193#comment-14988193
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ASF GitHub Bot commented on STORM-876:
--------------------------------------
Github user knusbaum commented on a diff in the pull request:
https://github.com/apache/storm/pull/845#discussion_r43811398
--- Diff: storm-core/src/clj/backtype/storm/daemon/nimbus.clj ---
@@ -1586,6 +1719,172 @@
topology-id
(doto (GetInfoOptions.)
(.set_num_err_choice NumErrorsChoice/ALL))))
+ ;;Blobstore implementation code
+ (^String beginCreateBlob [this
+ ^String blob-key
+ ^SettableBlobMeta blob-meta]
+ (let [session-id (uuid)]
+ (.put (:blob-uploaders nimbus)
+ session-id
+ (->> (ReqContext/context)
+ (.subject)
+ (.createBlob (:blob-store nimbus) blob-key blob-meta)))
+ (log-message "Created blob for " blob-key
+ " with session id " session-id)
+ (str session-id)))
+
+ (^String beginUpdateBlob [this ^String blob-key]
+ (if-let [^AtomicOutputStream os (->> (ReqContext/context)
+ (.subject)
+ (.updateBlob (:blob-store nimbus)
+ blob-key))]
+ (let [session-id (uuid)]
+ (.put (:blob-uploaders nimbus) session-id os)
+ (log-message "Created upload session for " blob-key
+ " with id " session-id)
+ (str session-id))
+ (throw-runtime "Could not find blob for key " blob-key)))
+
+ (^void createStateInZookeeper [this ^String blob-key]
+ (let [storm-cluster-state (:storm-cluster-state nimbus)
+ blob-store (:blob-store nimbus)
+ nimbus-host-port-info (:nimbus-host-port-info nimbus)]
+ (if (instance? LocalFsBlobStore blob-store)
+ (.setup-blobstore! storm-cluster-state blob-key
nimbus-host-port-info (get-metadata-version blob-store blob-key
(get-nimbus-subject))))
+ (log-debug "Created state in zookeeper" storm-cluster-state
blob-store nimbus-host-port-info)
+ ))
--- End diff --
Parens
> Dist Cache: Basic Functionality
> -------------------------------
>
> Key: STORM-876
> URL: https://issues.apache.org/jira/browse/STORM-876
> Project: Apache Storm
> Issue Type: Improvement
> Components: storm-core
> Reporter: Robert Joseph Evans
> Assignee: Robert Joseph Evans
> Attachments: DISTCACHE.md, DistributedCacheDesignDocument.pdf
>
>
> Basic functionality for the Dist Cache feature.
> As part of this a new API should be added to support uploading and
> downloading dist cache items. storm-core.ser, storm-conf.ser and storm.jar
> should be written into the blob store instead of residing locally. We need a
> default implementation of the blob store that does essentially what nimbus
> currently does and does not need anything extra. But having an HDFS backend
> too would be great for scalability and HA.
> The supervisor should provide a way to download and manage these blobs and
> provide a working directory for the worker process with symlinks to the
> blobs. It should also allow the blobs to be updated and switch the symlink
> atomically to point to the new blob once it is downloaded.
> All of this is already done by code internal to Yahoo! we are in the process
> of getting it ready to push back to open source shortly.
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