emiliosetiadarma commented on code in PR #5947: URL: https://github.com/apache/nifi/pull/5947#discussion_r864046803
########## nifi-nar-bundles/nifi-social-media-bundle/nifi-twitter-processors/src/main/java/org/apache/nifi/processors/twitter/ConsumeTwitter.java: ########## @@ -0,0 +1,366 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.processors.twitter; + +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.behavior.PrimaryNodeOnly; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.annotation.lifecycle.OnStopped; +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.flowfile.attributes.CoreAttributes; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessorInitializationContext; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.io.OutputStreamCallback; +import org.apache.nifi.processor.util.StandardValidators; + +import java.io.IOException; +import java.io.OutputStream; +import java.nio.charset.StandardCharsets; +import java.util.Set; +import java.util.List; +import java.util.HashSet; +import java.util.ArrayList; +import java.util.Collections; +import java.util.Map; +import java.util.HashMap; +import java.util.UUID; +import java.util.concurrent.BlockingQueue; +import java.util.concurrent.LinkedBlockingQueue; + +@PrimaryNodeOnly +@SupportsBatching +@InputRequirement(Requirement.INPUT_FORBIDDEN) +@Tags({"twitter", "tweets", "social media", "status", "json"}) +@CapabilityDescription("Streams tweets from Twitter's streaming API v2. The stream provides a sample stream or a search " + + "stream based on previously uploaded rules. This processor also provides a pass through for certain fields of the " + + "tweet to be returned as part of the response. See " + + "https://developer.twitter.com/en/docs/twitter-api/data-dictionary/introduction for more information regarding the " + + "Tweet object model. \n\n" + + "Warning: the underlying Java SDK used is still in beta as of the publishing of this processor feature.") +@WritesAttribute(attribute = "mime.type", description = "Sets mime type to application/json") +public class ConsumeTwitter extends AbstractProcessor { + + static final AllowableValue ENDPOINT_SAMPLE = new AllowableValue(StreamEndpoint.SAMPLE_ENDPOINT.getEndpointName(), + "Sample Stream", + "Streams about one percent of all Tweets. " + + "https://developer.twitter.com/en/docs/twitter-api/tweets/volume-streams/api-reference/get-tweets-sample-stream";); + static final AllowableValue ENDPOINT_SEARCH = new AllowableValue(StreamEndpoint.SEARCH_ENDPOINT.getEndpointName(), + "Search Stream", + "The endpoint that provides a stream of tweets that matches the rules you added to the stream. " + + "If rules are not configured, then the stream will be empty. " + + "https://developer.twitter.com/en/docs/twitter-api/tweets/filtered-stream/api-reference/get-tweets-search-stream";); + + public static final PropertyDescriptor ENDPOINT = new PropertyDescriptor.Builder() + .name("stream-endpoint") + .displayName("Stream Endpoint") + .description("Specifies which endpoint tweets should be streamed. " + + "Usage of search endpoint requires that rules be uploaded beforehand. See " + + "https://developer.twitter.com/en/docs/twitter-api/tweets/filtered-stream/api-reference/"; + + "post-tweets-search-stream-rules") + .required(true) + .allowableValues(ENDPOINT_SAMPLE, ENDPOINT_SEARCH) + .defaultValue(ENDPOINT_SAMPLE.getValue()) + .build(); + public static final PropertyDescriptor BASE_PATH = new PropertyDescriptor.Builder() + .name("base-path") + .displayName("Base Path") + .description("Specifies which base path the API client will use for HTTP requests. " + + "Generally should not be changed from the default https://api.twitter.com except for testing") + .required(true) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .defaultValue("https://api.twitter.com";) + .build(); + public static final PropertyDescriptor BEARER_TOKEN = new PropertyDescriptor.Builder() + .name("bearer-token") + .displayName("Bearer Token") + .description("The Bearer Token provided by Twitter.") + .required(true) + .sensitive(true) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + public static final PropertyDescriptor QUEUE_SIZE = new PropertyDescriptor.Builder() + .name("queue-size") + .displayName("Queue Size") + .description("Maximum size of internal queue for streamed messages") + .required(true) + .addValidator(StandardValidators.POSITIVE_INTEGER_VALIDATOR) + .defaultValue("10000") + .build(); + public static final PropertyDescriptor BATCH_SIZE = new PropertyDescriptor.Builder() + .name("batch-size") + .displayName("Batch Size") + .description("The maximum size of the number of tweets to be written to a single FlowFile." + + "Will write less tweets if it there are not any tweets left in queue") + .required(true) + .addValidator(StandardValidators.POSITIVE_INTEGER_VALIDATOR) + .defaultValue("10") + .build(); + public static final PropertyDescriptor BACKOFF_ATTEMPTS = new PropertyDescriptor.Builder() + .name("backoff-attempts") + .displayName("Backoff Attempts") + .description("The number of reconnection tries the processor will attempt in the event of " + + "a disconnection of the stream for any reason, before throwing an exception. To start a stream after " + + "this exception occur and the connection is fixed, please stop and restart the processor. If the value" + + "of this property is 0, then backoff will never occur and the processor will always need to be restarted" + + "if the stream fails.") + .required(true) + .addValidator(StandardValidators.NON_NEGATIVE_INTEGER_VALIDATOR) + .defaultValue("5") + .build(); + public static final PropertyDescriptor BACKOFF_TIME = new PropertyDescriptor.Builder() + .name("backoff-time") + .displayName("Backoff Time") + .description("The duration to backoff to start attempting a new stream if" + + "the current one fails for any reason. Will increase by factor of 2 every time a restart fails") + .required(true) + .addValidator(StandardValidators.TIME_PERIOD_VALIDATOR) + .defaultValue("1 mins") + .build(); + public static final PropertyDescriptor MAXIMUM_BACKOFF_TIME = new PropertyDescriptor.Builder() + .name("maximum-backoff-time") + .displayName("Maximum Backoff Time") + .description("The maximum duration to backoff to start attempting a new stream." + + "It is recommended that this number be much higher than the 'Backoff Time' property") + .required(true) + .addValidator(StandardValidators.TIME_PERIOD_VALIDATOR) + .defaultValue("5 mins") + .build(); + public static final PropertyDescriptor CONNECT_TIMEOUT = new PropertyDescriptor.Builder() + .name("connect-timeout") + .displayName("Connect Timeout") + .description("The maximum time in which client should establish a connection with the " + + "Twitter API before a time out. A value of 0 will mean no timeout at all") + .required(true) + .addValidator(StandardValidators.TIME_PERIOD_VALIDATOR) + .defaultValue("10 secs") + .build(); + public static final PropertyDescriptor READ_TIMEOUT = new PropertyDescriptor.Builder() + .name("read-timeout") + .displayName("Read Timeout") + .description("The maximum time of inactivity between receiving tweets from Twitter through " + + "the API before a timeout. A value of 0 will mean no timeout at all") + .required(true) + .addValidator(StandardValidators.TIME_PERIOD_VALIDATOR) + .defaultValue("10 secs") + .build(); + public static final PropertyDescriptor BACKFILL_MINUTES = new PropertyDescriptor.Builder() + .name("backfill-minutes") + .displayName("Backfill Minutes") + .description("The number of minutes (up to 5 minutes) of streaming data to be requested after a " + + "disconnect. Only available for project with academic research access. See " + + "https://developer.twitter.com/en/docs/twitter-api/tweets/filtered-stream/integrate/"; + + "recovery-and-redundancy-features") + .required(true) + .defaultValue("0") + .addValidator(StandardValidators.NON_NEGATIVE_INTEGER_VALIDATOR) + .build(); + public static final PropertyDescriptor TWEET_FIELDS = new PropertyDescriptor.Builder() + .name("tweet-fields") + .displayName("Tweet Fields") + .description("A comma-separated list of tweet fields to be returned as part of the tweet. Refer to " + + "https://developer.twitter.com/en/docs/twitter-api/data-dictionary/object-model/tweet " + + "for proper usage. Possible field values include: " + + "attachments, author_id, context_annotations, conversation_id, created_at, entities, geo, id, " + + "in_reply_to_user_id, lang, non_public_metrics, organic_metrics, possibly_sensitive, promoted_metrics, " + + "public_metrics, referenced_tweets, reply_settings, source, text, withheld") + .required(false) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + public static final PropertyDescriptor USER_FIELDS = new PropertyDescriptor.Builder() + .name("user-fields") + .displayName("User Fields") + .description("A comma-separated list of user fields to be returned as part of the tweet. Refer to " + + "https://developer.twitter.com/en/docs/twitter-api/data-dictionary/object-model/user " + + "for proper usage. Possible field values include: " + + "created_at, description, entities, id, location, name, pinned_tweet_id, profile_image_url, " + + "protected, public_metrics, url, username, verified, withheld") + .required(false) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + public static final PropertyDescriptor MEDIA_FIELDS = new PropertyDescriptor.Builder() + .name("media-fields") + .displayName("Media Fields") + .description("A comma-separated list of media fields to be returned as part of the tweet. Refer to " + + "https://developer.twitter.com/en/docs/twitter-api/data-dictionary/object-model/media " + + "for proper usage. Possible field values include: " + + "alt_text, duration_ms, height, media_key, non_public_metrics, organic_metrics, preview_image_url, " + + "promoted_metrics, public_metrics, type, url, width") + .required(false) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + public static final PropertyDescriptor POLL_FIELDS = new PropertyDescriptor.Builder() + .name("poll-fields") + .displayName("Poll Fields") + .description("A comma-separated list of poll fields to be returned as part of the tweet. Refer to " + + "https://developer.twitter.com/en/docs/twitter-api/data-dictionary/object-model/poll " + + "for proper usage. Possible field values include: " + + "duration_minutes, end_datetime, id, options, voting_status") + .required(false) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + public static final PropertyDescriptor PLACE_FIELDS = new PropertyDescriptor.Builder() + .name("place-fields") + .displayName("Place Fields") + .description("A comma-separated list of place fields to be returned as part of the tweet. Refer to " + + "https://developer.twitter.com/en/docs/twitter-api/data-dictionary/object-model/place " + + "for proper usage. Possible field values include: " + + "contained_within, country, country_code, full_name, geo, id, name, place_type") + .required(false) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + public static final PropertyDescriptor EXPANSIONS = new PropertyDescriptor.Builder() + .name("expansions") + .displayName("Expansions") + .description("A comma-separated list of expansions for objects in the returned tweet. See " + + "https://developer.twitter.com/en/docs/twitter-api/expansions " + + "for proper usage. Possible field values include: " + + "author_id, referenced_tweets.id, referenced_tweets.id.author_id, entities.mentions.username, " + + "attachments.poll_ids, attachments.media_keys ,in_reply_to_user_id, geo.place_id") + .required(false) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + + public static final Relationship REL_SUCCESS = new Relationship.Builder() + .name("success") + .description("FlowFiles containing an array of one or more Tweets") + .build(); + + private List<PropertyDescriptor> descriptors; + private Set<Relationship> relationships; + + private TweetStreamService tweetStreamService; + + private volatile BlockingQueue<String> messageQueue; + + @Override + protected void init(ProcessorInitializationContext context) { + final List<PropertyDescriptor> descriptors = new ArrayList<>(); + descriptors.add(ENDPOINT); + descriptors.add(BASE_PATH); + descriptors.add(BEARER_TOKEN); + descriptors.add(QUEUE_SIZE); + descriptors.add(BATCH_SIZE); + descriptors.add(BACKOFF_ATTEMPTS); + descriptors.add(BACKOFF_TIME); + descriptors.add(MAXIMUM_BACKOFF_TIME); + descriptors.add(CONNECT_TIMEOUT); + descriptors.add(READ_TIMEOUT); + descriptors.add(BACKFILL_MINUTES); + descriptors.add(TWEET_FIELDS); + descriptors.add(USER_FIELDS); + descriptors.add(MEDIA_FIELDS); + descriptors.add(POLL_FIELDS); + descriptors.add(PLACE_FIELDS); + descriptors.add(EXPANSIONS); + + this.descriptors = Collections.unmodifiableList(descriptors); + + final Set<Relationship> relationships = new HashSet<>(); + relationships.add(REL_SUCCESS); + this.relationships = Collections.unmodifiableSet(relationships); + } + + @Override + public Set<Relationship> getRelationships() { + return this.relationships; + } + + @Override + public final List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return this.descriptors; + } + + + @OnScheduled + public void onScheduled(final ProcessContext context) { + messageQueue = new LinkedBlockingQueue<>(context.getProperty(QUEUE_SIZE).asInteger()); + + tweetStreamService = new TweetStreamService(context, messageQueue, getLogger()); + tweetStreamService.setBasePath(context.getProperty(BASE_PATH).getValue()); + final String endpointName = context.getProperty(ENDPOINT).getValue(); + if (ENDPOINT_SAMPLE.getValue().equals(endpointName)) { + tweetStreamService.start(StreamEndpoint.SAMPLE_ENDPOINT); + } else { + tweetStreamService.start(StreamEndpoint.SEARCH_ENDPOINT); + } + } + + @Override + public void onTrigger(ProcessContext context, ProcessSession session) throws ProcessException { + if (messageQueue.isEmpty()) { + context.yield(); + return; + } + + FlowFile flowFile = session.create(); + flowFile = session.write(flowFile, new OutputStreamCallback() { + @Override + public void process(OutputStream out) throws IOException { + + final int batchSize = context.getProperty(BATCH_SIZE).asInteger(); + String tweet = messageQueue.poll(); Review Comment: Making the changes -- This is an automated message from the Apache Git Service. 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