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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| var azure = require('azure-storage'), | ||
| uuid = require('node-uuid'), | ||
| crypto = require('crypto'), | ||
| async = require('async'); | ||
|
|
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| module.exports.azure_store = function(name, key) { | ||
| var accountUrl = name + ".table.core.windows.net"; | ||
| var accountName = name; | ||
| var accountKey = key; | ||
|
|
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| function sha1_hash(val) { | ||
| var shasum = crypto.createHash('sha1'); | ||
| shasum.update(val); | ||
| return shasum.digest('hex'); | ||
| } | ||
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| function tablename(ehnamespace, ehname) { | ||
| return "tbl" + sha1_hash(ehnamespace + ":" + ehname); | ||
| } | ||
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| function partitionkey(consumergroup) { | ||
| return "pk" + sha1_hash(consumergroup); | ||
| } | ||
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|
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| function rowkey(partition) { | ||
| return "rk" + sha1_hash("partition:" + partition); | ||
| } | ||
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| function retrieve_partition_state(tablesvc, ehnamespace, ehname, consumergroup, partitionid, callback) { | ||
| tablesvc.retrieveEntity(tablename(ehnamespace, ehname), partitionkey(consumergroup), rowkey(partitionid), function(error, result, response) { | ||
| callback(error, result, response); | ||
| }); | ||
| } | ||
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| var store = { | ||
| store_eventhub_state: function(ehnamespace, ehname, consumergroup, partitioninfo, callback) { | ||
| var tablesvc = azure.createTableService(accountName, accountKey); | ||
| console.log("HERE 1"); | ||
| if(tablesvc) { | ||
| var batch = new azure.TableBatch(); | ||
| var entityGen = azure.TableUtilities.entityGenerator; | ||
| for(var i = 0; i < partitioninfo.length; i++) { | ||
| var entity = { | ||
| PartitionKey: entityGen.String(partitionkey(consumergroup)), | ||
| RowKey: entityGen.String(rowkey(partitioninfo[i].id)), | ||
| State: entityGen.String(JSON.stringify(partitioninfo[i].state)) | ||
| }; | ||
| batch.insertOrReplaceEntity(entity); | ||
| } | ||
| tablesvc.executeBatch(tablename(ehnamespace, ehname), batch, function(error, result, response) { | ||
| callback(error, result, response); | ||
| }); | ||
| } else { | ||
| // TODO -- error out | ||
| } | ||
| }, | ||
|
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| retrieve_eventhub_state: function(ehnamespace, ehname, consumergroup, partitioninfo, callback) { | ||
| var tablesvc = azure.createTableService(accountName, accountKey); | ||
| if(tablesvc) { | ||
| var asyncTasks = []; | ||
| var partitionResults = []; | ||
| partitioninfo.forEach(function(partition) { | ||
| var partitionid = partition.id; | ||
| asyncTasks.push(function(cb) { | ||
| retrieve_partition_state(tablesvc, ehnamespace, ehname, consumergroup, partitionid, function(error, result, response) { | ||
| var partitionState = { id: partitionid }; | ||
| if(!error) { | ||
| partitionState["state"] = JSON.parse(result.State["_"]); | ||
| } else { | ||
| if(error.statusCode && error.statusCode == 404) { | ||
| partitionState["state"] = {}; | ||
| } else { | ||
| partitionState["error"] = error; | ||
| } | ||
| } | ||
| cb(null, partitionState); | ||
| }); | ||
| }); | ||
| }); | ||
| async.parallel(asyncTasks, function(err, results) { | ||
| callback(results); | ||
| }); | ||
| } | ||
| } | ||
| }; | ||
|
|
||
| return store; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| #!/usr/bin/env node | ||
| var eventhub = require("..").eventhub; | ||
| var optimist = require('optimist') | ||
| .options('e', { alias : 'eventhub' }) | ||
| .options('n', { alias : 'namespace' }) | ||
| .options('a', { alias : 'accessuser' }) | ||
| .options('p', { alias : 'accesspass' }) | ||
| .options('g', { alias : 'consumergroup', default : '$default' }) | ||
| .options('s', { alias : 'storagetable', default : null }) | ||
| .options('k', { alias : 'storagekey', default : null }) | ||
| .demand(['e', 'n', 'a', 'p']) | ||
| .usage("$0 -e eventhub -n eventhub_namespace -a eventhub_username -p eventhub_password [ -g consumergroup ] [ -s storagetable -k storagekey ]") | ||
| ; | ||
|
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| var ehnamespace = optimist.argv.namespace; | ||
| var ehname = optimist.argv.eventhub; | ||
| var access_user = optimist.argv.accessuser; | ||
| var access_pass = optimist.argv.accesspass; | ||
| var consumer_group = optimist.argv.consumergroup; | ||
|
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| var eh = eventhub.create_instance(ehnamespace, ehname, access_user, access_pass); | ||
|
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| var ehp = eh.event_processor_instance(consumer_group, function(message, sub) { | ||
| console.log("subscription -- " + sub); | ||
| if(message.body) { | ||
| console.log(message.body); | ||
| } | ||
| if(message.properties) { | ||
| console.log(message.properties); | ||
| } | ||
| if(message.annotations) { | ||
| console.log(message.annotations); | ||
| } | ||
| }); | ||
|
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| // indicate which partitions were subscribed to | ||
| ehp.subscribe_handler(function(url) { | ||
| console.log("subscribed to -- " + url); | ||
| }); | ||
|
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| // if specified, add a storage account | ||
| if(optimist.argv.storagetable && optimist.argv.storagekey) { | ||
| ehp.add_store(optimist.argv.storagetable, optimist.argv.storagekey); | ||
| } | ||
|
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| ehp.process(); | ||
|
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| // show state of event processor every 30 seconds | ||
| setInterval(function() { | ||
| var state = ehp.state(); | ||
| console.log(JSON.stringify(state, null, 2)); | ||
| }, 30000); |