/// <summary>
/// The Execute() function will be called, when a new tuple is available.
/// </summary>
/// <param name="tuple"></param>
public void Execute(SCPTuple tuple)
{
Context.Logger.Info("Execute enter");
string sentence = tuple.GetString(0);
foreach (string word in sentence.Split(' '))
{
Context.Logger.Info("Emit: {0}", word);
this.ctx.Emit(Constants.DEFAULT_STREAM_ID, new List<SCPTuple> { tuple }, new Values(word, word[0]));
}
if (enableAck)
{
if (Sample(50)) // this is to demo how to fail tuple. We do it randomly
{
Context.Logger.Info("fail tuple: tupleId: {0}", tuple.GetTupleId());
this.ctx.Fail(tuple);
}
else
{
if (Sample(50)) // this is to simulate timeout
{
Context.Logger.Info("sleep {0} seconds", msgTimeoutSecs+1);
Thread.Sleep((msgTimeoutSecs + 1) * 1000);
}
Context.Logger.Info("Ack tuple: tupleId: {0}", tuple.GetTupleId());
this.ctx.Ack(tuple);
}
}
Context.Logger.Info("Execute exit");
}
/// <summary>
/// The Execute() function will be called, when a new tuple is available.
/// </summary>
/// <param name="tuple"></param>
public void Execute(SCPTuple tuple)
{
Context.Logger.Info("Execute enter");
string word = tuple.GetString(0);
int count = counts.ContainsKey(word) ? counts[word] : 0;
count++;
counts[word] = count;
Context.Logger.Info("Emit: {0}, count: {1}", word, count);
this.ctx.Emit(Constants.DEFAULT_STREAM_ID, new List<SCPTuple> { tuple }, new Values(word, count));
if (enableAck)
{
Context.Logger.Info("Ack tuple: tupleId: {0}", tuple.GetTupleId());
this.ctx.Ack(tuple);
}
// log some info to out file for bvt test validataion
if (taskIndex == 0) // For component with multiple parallism, only one of them need to log info
{
string fileName = @"..\..\..\..\..\HelloWorldOutput" + Process.GetCurrentProcess().Id + ".txt";
FileStream fs = new FileStream(fileName, FileMode.Append);
using (StreamWriter writer = new StreamWriter(fs))
{
writer.WriteLine("word: {0}, count: {1}", word, count);
}
}
Context.Logger.Info("Execute exit");
}
public void Execute(SCPTuple tuple)
{
try
{
//TODO: Insert or Upsert or Delete depending on your logic
//Delete(new List<int>() { 1, 2 }, tuple.GetValues());
//Upsert(new List<int>() { 1, 2 }, tuple.GetValues());
Insert(tuple.GetValues());
//Ack the tuple if enableAck is set to true in TopologyBuilder. This is mandatory if the downstream bolt or spout expects an ack.
if (enableAck)
{
this.context.Ack(tuple);
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
//Fail the tuple if enableAck is set to true in TopologyBuilder so that the tuple is replayed.
if (enableAck)
{
this.context.Fail(tuple);
}
}
}
public void Execute(SCPTuple tuple)
{
Context.Logger.Info("Execute enter");
if (Constants.SYSTEM_TICK_STREAM_ID.Equals(tuple.GetSourceStreamId()))
{
long data = tuple.GetLong(0);
Context.Logger.Info("tick tuple, value: {0}", data);
}
else
{
byte[] data = tuple.GetBinary(0);
int bytesNum = data.Count();
if (enableAck)
{
this.ctx.Emit(Constants.DEFAULT_STREAM_ID, new List<SCPTuple> { tuple }, new Values(bytesNum));
this.ctx.Ack(tuple);
Context.Logger.Info("emit bytesNum: {0}", bytesNum);
Context.Logger.Info("Ack tuple: tupleId: {0}", tuple.GetTupleId());
}
else
{
this.ctx.Emit(Constants.DEFAULT_STREAM_ID, new Values(bytesNum));
Context.Logger.Info("emit bytesNum: {0}", bytesNum);
}
}
Context.Logger.Info("Execute exit");
}
public void Execute(SCPTuple tuple)
{
try
{
// TwitterFeed tweet = tuple.GetValue(0) as TwitterFeed;
TwitterFeed tweet = tuple.GetValue(0) as TwitterFeed;
if (tweet != null)
{
Context.Logger.Info("SQL AZURE: Id:" + tweet.Id.ToString());
Context.Logger.Info("SQL AZURE: Text:" + tweet.Text.ToString());
Context.Logger.Info("SQL AZURE: RetweetCount:" + tweet.RetweetCount.ToString());
Context.Logger.Info("SQL AZURE: FavoriteCount:" + tweet.FavoriteCount.ToString());
Context.Logger.Info("SQL AZURE: Score:" + tweet.Score.ToString());
Context.Logger.Info("SQL AZURE: Created Date:" + tweet.Createddate.ToString());
Context.Logger.Info("SQL AZURE: DateTime.UtcNow:" + DateTime.UtcNow.ToString());
}
List <object> rowValue = new List <object>();
rowValue.Add(tweet.Id);
rowValue.Add(tweet.Text);
rowValue.Add(tweet.RetweetCount);
rowValue.Add(tweet.FavoriteCount);
rowValue.Add(tweet.Score);
rowValue.Add(GetSentimentType(tweet.Text));
rowValue.Add(tweet.Createddate);
rowValue.Add(DateTime.UtcNow);
//Upsert(new List<int> { 1 }, rowValue);
Insert(rowValue);
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
}
}
/// <summary>
/// The Execute() function will be called, when a new tuple is available.
/// </summary>
/// <param name="tuple"></param>
public void Execute(SCPTuple tuple)
{
Context.Logger.Info("Execute enter");
string word = tuple.GetString(0);
int count = counts.ContainsKey(word) ? counts[word] : 0;
count++;
counts[word] = count;
Context.Logger.Info("Emit: {0}, count: {1}", word, count);
this.ctx.Emit(Constants.DEFAULT_STREAM_ID, new List <SCPTuple> {
tuple
}, new Values(word, count));
if (enableAck)
{
Context.Logger.Info("Ack tuple: tupleId: {0}", tuple.GetTupleId());
this.ctx.Ack(tuple);
}
// log some info to out file for bvt test validataion
if (taskIndex == 0) // For component with multiple parallism, only one of them need to log info
{
string fileName = @"..\..\..\..\..\HelloWorldOutput" + Process.GetCurrentProcess().Id + ".txt";
FileStream fs = new FileStream(fileName, FileMode.Append);
using (StreamWriter writer = new StreamWriter(fs))
{
writer.WriteLine("word: {0}, count: {1}", word, count);
}
}
Context.Logger.Info("Execute exit");
}
/// <summary>
/// Executes incoming tuples
/// </summary>
/// <param name="tuple">The first field is treated as rowkey and rest as column values</param>
public void Execute(SCPTuple tuple)
{
try
{
var isTickTuple = tuple.GetSourceStreamId().Equals(Constants.SYSTEM_TICK_STREAM_ID);
//Only add to cache if its not a Tick tuple
if (!isTickTuple)
{
//seqId helps in keeping the incoming tuples in order of their arrival
cachedTuples.Add(seqId, tuple);
seqId++;
}
//TODO: You can choose to write into HBase based on cached tuples count or when the tick tuple arrives
//To use Tick tuples make sure that you configure topology.tick.tuple.freq.secs on the bolt and also add the stream in the input streams
/* Add this section to your SetBolt in TopologyBuilder to trigger Tick tuples
* addConfigurations(new Dictionary<string, string>()
* {
* {"topology.tick.tuple.freq.secs", "5"}
* })
*/
//For this example, just emit on every tuple
//since we will be randomly generating end tuples only every few minutes.
if (cachedTuples.Count >= 1 || isTickTuple)
{
WriteToHBase();
//Ack the tuple if enableAck is set to true in TopologyBuilder. This is mandatory if the downstream bolt or spout expects an ack.
if (enableAck)
{
//Ack all the tuples in the batch
foreach (var cachedTuple in cachedTuples)
{
this.context.Ack(cachedTuple.Value);
}
}
cachedTuples.Clear();
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
//Is ack enabled?
if (enableAck)
{
Context.Logger.Error("Failing the entire current batch");
//Fail all the tuples in the batch
foreach (var cachedTuple in cachedTuples)
{
this.context.Fail(cachedTuple.Value);
}
}
}
}
public void Execute(SCPTuple tuple)
{
var isTickTuple = tuple.GetSourceStreamId().Equals(Constants.SYSTEM_TICK_STREAM_ID);
if (isTickTuple)
{
// Get top 10 higest score tweets from last time window
Context.Logger.Debug($"Total tweets in window: {tweetCache.Count}");
var topNTweets = tweetCache.OrderByDescending(o => o.Score).Take(Math.Min(10, tweetCache.Count)).ToList();
// Emit it to TopNTweet Stream
foreach (var tweet in topNTweets)
{
//this.context.Emit(StormConstants.TOPNTWEETS_STREAM, new Values(tweet.Text, tweet.Id, tweet.RetweetCount, tweet.FavoriteCount, tweet.UserFollowerCount, tweet.Score));
this.context.Emit("TOPNTWEETS_STREAM", new Values(tweet));
}
// Remove all existing data and wait for new one
tweetCache.Clear();
}
else
{
try
{
// Process tuple and then acknowledge it
SerializableTweet tweet = tuple.GetValue(0) as SerializableTweet;
if (!tweetCache.Any(o => o.Id.Equals(tweet.Id)))
{
tweetCache.Add(tweet);
}
Context.Logger.Info(tweet.ToString());
if (enableAck)
{
this.context.Ack(tuple);
Context.Logger.Info("Total Ack: " + ++totalAck);
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
//Fail the tuple if enableAck is set to true in TopologyBuilder so that the tuple is replayed.
if (enableAck)
{
this.context.Fail(tuple);
}
}
}
}
public void Execute(SCPTuple tuple)
{
Context.Logger.Info("Execute enter");
int bytesNum = tuple.GetInteger(0);
totalNum += bytesNum;
Context.Logger.Info("bytesNum: {0}, totalNum: {1}", bytesNum, totalNum);
if (enableAck)
{
Context.Logger.Info("Ack tuple: tupleId: {0}", tuple.GetTupleId());
this.ctx.Ack(tuple);
}
Context.Logger.Info("Execute exit");
}
public void Execute(SCPTuple tuple)
{
var isTickTuple = tuple.GetSourceStreamId().Equals(Constants.SYSTEM_TICK_STREAM_ID);
if (isTickTuple)
{
// Get top 10 higest forwards + retweets count from last time window of 5 seconds
Context.Logger.Debug($"Total tweets in window: {tweetCache.Count}");
var topNTweets = tweetCache.OrderByDescending(o => o.Score).Take(Math.Min(10, tweetCache.Count)).ToList();
foreach (var tweet in topNTweets)
{
this.context.Emit("TWEETRANK_STREAM", new Values(tweet));
}
tweetCache.Clear();
}
else
{
try
{
TwitterFeed tweet = tuple.GetValue(0) as TwitterFeed;
if (!tweetCache.Any(o => o.Id.Equals(tweet.Id)))
{
tweetCache.Add(tweet);
}
Context.Logger.Info(tweet.ToString());
if (enableAck)
{
this.context.Ack(tuple);
Context.Logger.Info("Total Ack: " + ++totalAck);
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
if (enableAck)
{
this.context.Fail(tuple);
}
}
}
}
public void Execute(SCPTuple tuple)
{
Context.Logger.Info("Execute enter");
int bytesNum = tuple.GetInteger(0);
totalNum += bytesNum;
Context.Logger.Info("bytesNum: {0}, totalNum: {1}", bytesNum, totalNum);
if (enableAck)
{
Context.Logger.Info("Ack tuple: tupleId: {0}", tuple.GetTupleId());
this.ctx.Ack(tuple);
}
Context.Logger.Info("Execute exit");
}
public void Execute(SCPTuple tuple)
{
try
{
count++;
var sb = new StringBuilder();
sb.AppendFormat("Received Tuple {0}: ", count);
var values = tuple.GetValues();
for (int i = 0; i < values.Count; i++)
{
if (i > 0)
{
sb.Append(", ");
}
sb.AppendFormat("{0} = {1}", i, values[i].ToString());
}
Context.Logger.Info(sb.ToString());
Context.Logger.Info("Tuple values as JSON: " +
(values.Count == 1 ? JsonConvert.SerializeObject(values[0]) : JsonConvert.SerializeObject(values)));
//Ack the tuple if enableAck is set to true in TopologyBuilder. This is mandatory if the downstream bolt or spout expects an ack.
if (enableAck)
{
this.context.Ack(tuple);
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
//Fail the tuple if enableAck is set to true in TopologyBuilder so that the tuple is replayed.
if (enableAck)
{
this.context.Fail(tuple);
}
}
}
public void Execute(SCPTuple tuple)
{
try
{
count++;
var sb = new StringBuilder();
sb.AppendFormat("Received Tuple {0}: ", count);
var values = tuple.GetValues();
for (int i = 0; i < values.Count; i++)
{
if (i > 0)
{
sb.Append(", ");
}
sb.AppendFormat("{0} = {1}", i, values[i].ToString());
}
Context.Logger.Info(sb.ToString());
Context.Logger.Info("Tuple values as JSON: " +
(values.Count == 1 ? JsonConvert.SerializeObject(values[0]) : JsonConvert.SerializeObject(values)));
//Ack the tuple if enableAck is set to true in TopologyBuilder. This is mandatory if the downstream bolt or spout expects an ack.
if (enableAck)
{
this.context.Ack(tuple);
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
//Fail the tuple if enableAck is set to true in TopologyBuilder so that the tuple is replayed.
if (enableAck)
{
this.context.Fail(tuple);
}
}
}
public void Execute(SCPTuple tuple)
{
try
{
if (hubConnection.State != ConnectionState.Connected)
{
hubConnection.Stop();
StartSignalRHubConnection();
}
var values = tuple.GetValues();
hubProxy.Invoke(this.SignalRMethod, values);
//Ack the tuple if enableAck is set to true in TopologyBuilder. This is mandatory if the downstream bolt or spout expects an ack.
if (enableAck)
{
this.context.Ack(tuple);
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
//Fail the tuple if enableAck is set to true in TopologyBuilder so that the tuple is replayed.
if (enableAck)
{
this.context.Fail(tuple);
}
}
}
/// <summary>
/// The execute method for incoming tuples
/// </summary>
/// <param name="tuple">The incoming tuple</param>
public void Execute(SCPTuple tuple)
{
try
{
//Assuming that the first field of the incoming tuple has the lookup value you are interested in
var value = tuple.GetValue(0);
var lookupValue = value.ToString();
IEnumerable <object> documents = null;
if (value is string)
{
documents = this.documentClient.CreateDocumentQuery(documentCollection.DocumentsLink).
Where(d => d.Id.Equals(value)).AsEnumerable();
}
else
{
Context.Logger.Info("Lookup value is not a string, getting the value for the lookup field in the object.");
lookupValue = value.GetType().GetProperty(this.DocumentDbLookupField).GetValue(value).ToString();
string query = "SELECT * FROM ROOT R WHERE R[\"" + this.DocumentDbLookupField + "\"] = \"" + lookupValue + "\"";
Context.Logger.Info("DocumentDb Query: {0}", query);
documents = this.documentClient.CreateDocumentQuery(documentCollection.DocumentsLink, query).AsEnumerable();
}
if (documents.Count() == 0)
{
Context.Logger.Info("No documents found for lookup field: {0}, lookup value: {1}", this.DocumentDbLookupField, lookupValue);
}
else
{
foreach (var document in documents)
{
//A document is just JSON so we will call a ToString() to set the emitValue as JSON string
var emitValue = document.ToString();
Context.Logger.Info("Found document for lookup field: {0}, lookup value: {1}, document: {2}",
this.DocumentDbLookupField, lookupValue, emitValue);
if (enableAck)
{
//NOTE: For a Bolt with enableAck we need to emit with anchors - list of tuples
//In this scenario we are emitting per tuple so the anchor is only for this tuple
this.context.Emit(Constants.DEFAULT_STREAM_ID, new List <SCPTuple>()
{
tuple
}, new Values(emitValue));
}
else
{
this.context.Emit(Constants.DEFAULT_STREAM_ID, new Values(emitValue));
}
}
}
//Ack the tuple if enableAck is set to true in TopologyBuilder. This is mandatory if the downstream bolt or spout expects an ack.
if (enableAck)
{
this.context.Ack(tuple);
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
//Fail the tuple if enableAck is set to true in TopologyBuilder so that the tuple is replayed.
if (enableAck)
{
this.context.Fail(tuple);
}
}
}
/// <summary>
/// Executes incoming tuples
/// </summary>
/// <param name="tuple">The first field is treated as rowkey and rest as column names</param>
public void Execute(SCPTuple tuple)
{
try
{
//TODO: Change the HBase scanning criteria as per your needs
//filter = new PrefixFilter(ToBytes(tuple.GetValue(0)))
//Or, use a different field for end scan like: endRow = ToBytes(tuple.GetValue(1))
var scannersettings = new Scanner()
{
startRow = ToBytes(tuple.GetValue(0)),
endRow = ToBytes(tuple.GetValue(0)),
};
var scannerInfo = HBaseClusterClient.CreateScanner(this.HBaseTableName, scannersettings);
CellSet readSet = null;
while ((readSet = HBaseClusterClient.ScannerGetNext(scannerInfo)) != null)
{
Context.Logger.Info("Rows found: {0}", readSet.rows.Count);
foreach (var row in readSet.rows)
{
var emitValues = new List <object>();
//TODO: You can choose to emit the row key along with the values
emitValues.Add(Encoding.UTF8.GetString(row.key));
//Add the values from the readSet
//TODO: The byte[] from HBase can be any type, make sure you type cast it correctly before emitting
//The code below only handles strings
emitValues.AddRange(row.values.Select(v => Encoding.UTF8.GetString(v.data)));
Context.Logger.Info("Rowkey: {0}, Values: {1}",
Encoding.UTF8.GetString(row.key), String.Join(", ", row.values.Select(v => Encoding.UTF8.GetString(v.data))));
if (enableAck)
{
this.context.Emit(Constants.DEFAULT_STREAM_ID, new List <SCPTuple>()
{
tuple
}, emitValues);
}
else
{
this.context.Emit(Constants.DEFAULT_STREAM_ID, emitValues);
}
}
}
//Ack the tuple if enableAck is set to true in TopologyBuilder. This is mandatory if the downstream bolt or spout expects an ack.
if (enableAck)
{
this.context.Ack(tuple);
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
//Fail the tuple if enableAck is set to true in TopologyBuilder so that the tuple is replayed.
if (enableAck)
{
this.context.Fail(tuple);
}
}
}
/// <summary>
/// The execute method for tuple received
/// </summary>
/// <param name="tuple"></param>
public void Execute(SCPTuple tuple)
{
try
{
var task = eventHubSender.SendAsync(new EventData(Encoding.UTF8.GetBytes(tuple.GetString(0))));
if (ackEnabled)
{
tasks.Add(task);
this.context.Ack(tuple);
if (tasks.Count >= 100)
{
Context.Logger.Info("Total tasks in waiting = {0}", tasks.Count);
Task.WaitAll(tasks.ToArray());
tasks.Clear();
Context.Logger.Info("All waiting tasks completed successfully!", tasks.Count);
}
}
global_emit_count++;
if (global_emit_count % 5000 == 0)
{
Context.Logger.Info("Total events sent to EventHub = {0} ({1} events/sec)", global_emit_count, global_emit_count / globalStopwatch.Elapsed.TotalSeconds);
}
}
catch (Exception ex)
{
Context.Logger.Error("Failed to send tuples. Last Id = {0}, Value = {1}. Tasks = {2}", tuple.GetTupleId(), tuple.GetString(0), tasks.Count);
Context.Logger.Error("Error Details: {0}", ex.ToString());
if (ackEnabled)
{
this.context.Fail(tuple);
}
global_error_count++;
if (global_error_count > 10)
{
Context.Logger.Error("High error count: {0}", global_error_count);
throw;
}
}
}
/// <summary>
/// The execute method for tuple received
/// </summary>
/// <param name="tuple"></param>
public void Execute(SCPTuple tuple)
{
try
{
var task = eventHubSender.SendAsync(new EventData(Encoding.UTF8.GetBytes(tuple.GetString(0))));
if (ackEnabled)
{
tasks.Add(task);
this.context.Ack(tuple);
if (tasks.Count >= 100)
{
Context.Logger.Info("Total tasks in waiting = {0}", tasks.Count);
Task.WaitAll(tasks.ToArray());
tasks.Clear();
Context.Logger.Info("All waiting tasks completed successfully!", tasks.Count);
}
}
global_emit_count++;
if (global_emit_count % 5000 == 0)
{
Context.Logger.Info("Total events sent to EventHub = {0} ({1} events/sec)", global_emit_count, global_emit_count / globalStopwatch.Elapsed.TotalSeconds);
}
}
catch (Exception ex)
{
Context.Logger.Error("Failed to send tuples. Last Id = {0}, Value = {1}. Tasks = {2}", tuple.GetTupleId(), tuple.GetString(0), tasks.Count);
Context.Logger.Error("Error Details: {0}", ex.ToString());
if (ackEnabled)
{
this.context.Fail(tuple);
}
global_error_count++;
if (global_error_count > 10)
{
Context.Logger.Error("High error count: {0}", global_error_count);
throw;
}
if (eventHubSender.IsClosed)
{
Context.Logger.Warn("EventHubSender is closed, re-intializing...");
InitializeEventHub();
}
}
}
public void Execute(SCPTuple tuple)
{
try
{
//TODO: Insert or Upsert or Delete depending on your logic
//Delete(new List<int>() { 1, 2 }, tuple.GetValues());
//Upsert(new List<int>() { 1, 2 }, tuple.GetValues());
Insert(tuple.GetValues());
//Ack the tuple if enableAck is set to true in TopologyBuilder. This is mandatory if the downstream bolt or spout expects an ack.
if (enableAck)
{
this.context.Ack(tuple);
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
//Fail the tuple if enableAck is set to true in TopologyBuilder so that the tuple is replayed.
if (enableAck)
{
this.context.Fail(tuple);
}
}
}
/// <summary>
/// The execute method for incoming tuples
/// </summary>
/// <param name="tuple">The incoming tuple</param>
public void Execute(SCPTuple tuple)
{
try
{
var values = tuple.GetValues();
foreach (var value in values)
{
Context.Logger.Info("Creating document: {0} with value: {1}", value, JsonConvert.SerializeObject(value));
var task = documentClient.CreateDocumentAsync(documentCollection.DocumentsLink, value);
task.Wait();
Context.Logger.Info("Document creation result status: {0}", task.Result.StatusCode);
}
//Ack the tuple if enableAck is set to true in TopologyBuilder.
//This is mandatory if the downstream bolt or spout expects an ack.
if (enableAck)
{
this.context.Ack(tuple);
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
//Fail the tuple if enableAck is set to true in TopologyBuilder so that the tuple is replayed.
if (enableAck)
{
this.context.Fail(tuple);
}
}
}
/// <summary>
/// The execute method for incoming tuples
/// </summary>
/// <param name="tuple">The incoming tuple</param>
public void Execute(SCPTuple tuple)
{
try
{
//Assuming that the first field of the incoming tuple has the lookup value you are interested in
var value = tuple.GetValue(0);
var lookupValue = value.ToString();
IEnumerable<object> documents = null;
if (value is string)
{
documents = this.documentClient.CreateDocumentQuery(documentCollection.DocumentsLink).
Where(d => d.Id.Equals(value)).AsEnumerable();
}
else
{
Context.Logger.Info("Lookup value is not a string, getting the value for the lookup field in the object.");
lookupValue = value.GetType().GetProperty(this.DocumentDbLookupField).GetValue(value).ToString();
string query = "SELECT * FROM ROOT R WHERE R[\"" + this.DocumentDbLookupField + "\"] = \"" + lookupValue + "\"";
Context.Logger.Info("DocumentDb Query: {0}", query);
documents = this.documentClient.CreateDocumentQuery(documentCollection.DocumentsLink, query).AsEnumerable();
}
if (documents.Count() == 0)
{
Context.Logger.Info("No documents found for lookup field: {0}, lookup value: {1}", this.DocumentDbLookupField, lookupValue);
}
else
{
foreach (var document in documents)
{
//A document is just JSON so we will call a ToString() to set the emitValue as JSON string
var emitValue = document.ToString();
Context.Logger.Info("Found document for lookup field: {0}, lookup value: {1}, document: {2}",
this.DocumentDbLookupField, lookupValue, emitValue);
if (enableAck)
{
//NOTE: For a Bolt with enableAck we need to emit with anchors - list of tuples
//In this scenario we are emitting per tuple so the anchor is only for this tuple
this.context.Emit(Constants.DEFAULT_STREAM_ID, new List<SCPTuple>() { tuple }, new Values(emitValue));
}
else
{
this.context.Emit(Constants.DEFAULT_STREAM_ID, new Values(emitValue));
}
}
}
//Ack the tuple if enableAck is set to true in TopologyBuilder. This is mandatory if the downstream bolt or spout expects an ack.
if (enableAck)
{
this.context.Ack(tuple);
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
//Fail the tuple if enableAck is set to true in TopologyBuilder so that the tuple is replayed.
if (enableAck)
{
this.context.Fail(tuple);
}
}
}
/// <summary>
/// The execute method for tuple received
/// </summary>
/// <param name="tuple"></param>
public void Execute(SCPTuple tuple)
{
try
{
var values = tuple.GetValues();
var data = string.Empty;
if (values.Count == 1)
{
data = JsonConvert.SerializeObject(values[0]);
}
else
{
data = JsonConvert.SerializeObject(values);
}
eventHubSender.Send(new EventData(Encoding.UTF8.GetBytes(data)));
//Ack the tuple if enableAck is set to true in TopologyBuilder. This is mandatory if the downstream bolt or spout expects an ack.
if (enableAck)
{
this.context.Ack(tuple);
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
//Fail the tuple if enableAck is set to true in TopologyBuilder so that the tuple is replayed.
if (enableAck)
{
this.context.Fail(tuple);
}
}
}
/// <summary>
/// Executes incoming tuples
/// </summary>
/// <param name="tuple">The first field is treated as rowkey and rest as column values</param>
public void Execute(SCPTuple tuple)
{
try
{
var isTickTuple = tuple.GetSourceStreamId().Equals(Constants.SYSTEM_TICK_STREAM_ID);
//Only add to cache if its not a Tick tuple
if (!isTickTuple)
{
//seqId helps in keeping the incoming tuples in order of their arrival
cachedTuples.Add(seqId, tuple);
seqId++;
}
//TODO: You can choose to write into HBase based on cached tuples count or when the tick tuple arrives
//To use Tick tuples make sure that you configure topology.tick.tuple.freq.secs on the bolt and also add the stream in the input streams
/* Add this section to your SetBolt in TopologyBuilder to trigger Tick tuples
addConfigurations(new Dictionary<string, string>()
{
{"topology.tick.tuple.freq.secs", "5"}
})
*/
if (cachedTuples.Count >= 1000 || isTickTuple)
{
WriteToHBase();
//Ack the tuple if enableAck is set to true in TopologyBuilder. This is mandatory if the downstream bolt or spout expects an ack.
if (enableAck)
{
//Ack all the tuples in the batch
foreach(var cachedTuple in cachedTuples)
{
this.context.Ack(cachedTuple.Value);
}
}
cachedTuples.Clear();
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
if (enableAck)
{
Context.Logger.Error("Failing the entire current batch");
//Fail all the tuples in the batch
foreach (var cachedTuple in cachedTuples)
{
this.context.Fail(cachedTuple.Value);
}
}
}
}
/// <summary>
/// Executes incoming tuples
/// </summary>
/// <param name="tuple">The first field is treated as rowkey and rest as column names</param>
public void Execute(SCPTuple tuple)
{
try
{
//TODO: Change the HBase scanning criteria as per your needs
//filter = new PrefixFilter(ToBytes(tuple.GetValue(0)))
//Or, use a different field for end scan like: endRow = ToBytes(tuple.GetValue(1))
var scannersettings = new Scanner()
{
startRow = ToBytes(tuple.GetValue(0)),
endRow = ToBytes(tuple.GetValue(0)),
};
var scannerInfo = HBaseClusterClient.CreateScanner(this.HBaseTableName, scannersettings);
CellSet readSet = null;
while ((readSet = HBaseClusterClient.ScannerGetNext(scannerInfo)) != null)
{
Context.Logger.Info("Rows found: {0}", readSet.rows.Count);
foreach (var row in readSet.rows)
{
var emitValues = new List<object>();
//TODO: You can choose to emit the row key along with the values
emitValues.Add(Encoding.UTF8.GetString(row.key));
//Add the values from the readSet
//TODO: The byte[] from HBase can be any type, make sure you type cast it correctly before emitting
//The code below only handles strings
emitValues.AddRange(row.values.Select(v => Encoding.UTF8.GetString(v.data)));
Context.Logger.Info("Rowkey: {0}, Values: {1}",
Encoding.UTF8.GetString(row.key), String.Join(", ", row.values.Select(v => Encoding.UTF8.GetString(v.data))));
if (enableAck)
{
this.context.Emit(Constants.DEFAULT_STREAM_ID, new List<SCPTuple>() { tuple }, emitValues);
}
else
{
this.context.Emit(Constants.DEFAULT_STREAM_ID, emitValues);
}
}
}
//Ack the tuple if enableAck is set to true in TopologyBuilder. This is mandatory if the downstream bolt or spout expects an ack.
if (enableAck)
{
this.context.Ack(tuple);
}
}
catch (Exception ex)
{
Context.Logger.Error("An error occured while executing Tuple Id: {0}. Exception Details:\r\n{1}",
tuple.GetTupleId(), ex.ToString());
//Fail the tuple if enableAck is set to true in TopologyBuilder so that the tuple is replayed.
if (enableAck)
{
this.context.Fail(tuple);
}
}
}
