Github user mattyb149 commented on a diff in the pull request: https://github.com/apache/nifi/pull/1618#discussion_r109704801 --- Diff: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/CaptureChangeMySQL.java --- @@ -0,0 +1,1001 @@ +/* + * 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.standard; + +import com.github.shyiko.mysql.binlog.BinaryLogClient; +import com.github.shyiko.mysql.binlog.event.Event; +import com.github.shyiko.mysql.binlog.event.EventHeaderV4; +import com.github.shyiko.mysql.binlog.event.EventType; +import com.github.shyiko.mysql.binlog.event.QueryEventData; +import com.github.shyiko.mysql.binlog.event.RotateEventData; +import com.github.shyiko.mysql.binlog.event.TableMapEventData; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.Stateful; +import org.apache.nifi.annotation.behavior.TriggerSerially; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnShutdown; +import org.apache.nifi.annotation.lifecycle.OnStopped; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.components.PropertyValue; +import org.apache.nifi.components.state.Scope; +import org.apache.nifi.components.state.StateManager; +import org.apache.nifi.components.state.StateMap; +import org.apache.nifi.distributed.cache.client.Deserializer; +import org.apache.nifi.distributed.cache.client.DistributedMapCacheClient; +import org.apache.nifi.distributed.cache.client.Serializer; +import org.apache.nifi.logging.ComponentLog; +import org.apache.nifi.processor.AbstractSessionFactoryProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessSessionFactory; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.util.StandardValidators; +import org.apache.nifi.processors.standard.db.CDCException; +import org.apache.nifi.processors.standard.db.event.ColumnDefinition; +import org.apache.nifi.processors.standard.db.event.RowEventException; +import org.apache.nifi.processors.standard.db.event.TableInfo; +import org.apache.nifi.processors.standard.db.event.TableInfoCacheKey; +import org.apache.nifi.processors.standard.db.event.io.EventWriter; +import org.apache.nifi.processors.standard.db.impl.mysql.BinlogLifecycleListener; +import org.apache.nifi.processors.standard.db.impl.mysql.event.BeginTransactionEventInfo; +import org.apache.nifi.processors.standard.db.impl.mysql.RawBinlogEvent; +import org.apache.nifi.processors.standard.db.impl.mysql.BinlogEventListener; +import org.apache.nifi.processors.standard.db.impl.mysql.event.BinlogEventInfo; +import org.apache.nifi.processors.standard.db.impl.mysql.event.CommitTransactionEventInfo; +import org.apache.nifi.processors.standard.db.impl.mysql.event.DeleteRowsEventInfo; +import org.apache.nifi.processors.standard.db.impl.mysql.event.SchemaChangeEventInfo; +import org.apache.nifi.processors.standard.db.impl.mysql.event.UpdateRowsEventInfo; +import org.apache.nifi.processors.standard.db.impl.mysql.event.InsertRowsEventInfo; +import org.apache.nifi.processors.standard.db.impl.mysql.event.io.BeginTransactionEventWriter; +import org.apache.nifi.processors.standard.db.impl.mysql.event.io.CommitTransactionEventWriter; +import org.apache.nifi.processors.standard.db.impl.mysql.event.io.DeleteRowsWriter; +import org.apache.nifi.processors.standard.db.impl.mysql.event.io.InsertRowsWriter; +import org.apache.nifi.processors.standard.db.impl.mysql.event.io.SchemaChangeEventWriter; +import org.apache.nifi.processors.standard.db.impl.mysql.event.io.UpdateRowsWriter; +import org.apache.nifi.reporting.InitializationException; +import org.apache.nifi.util.StringUtils; +import org.apache.nifi.util.file.classloader.ClassLoaderUtils; + +import java.io.IOException; +import java.net.ConnectException; +import java.net.InetSocketAddress; +import java.net.MalformedURLException; +import java.sql.Connection; +import java.sql.Driver; +import java.sql.DriverManager; +import java.sql.DriverPropertyInfo; +import java.sql.ResultSet; +import java.sql.ResultSetMetaData; +import java.sql.SQLException; +import java.sql.SQLFeatureNotSupportedException; +import java.sql.Statement; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Properties; +import java.util.Set; +import java.util.concurrent.LinkedBlockingQueue; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.TimeoutException; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicLong; +import java.util.logging.Logger; +import java.util.regex.Pattern; + +/** + * A processor to retrieve Change Data Capture (CDC) events and send them as flow files. + */ +@TriggerSerially +@InputRequirement(InputRequirement.Requirement.INPUT_FORBIDDEN) +@Tags({"sql", "jdbc", "cdc", "mysql"}) +@CapabilityDescription("Retrieves Change Data Capture (CDC) events from a MySQL database. CDC Events include INSERT, UPDATE, DELETE operations. Events " + + "are output as individual flow files ordered by the time at which the operation occurred.") +@Stateful(scopes = Scope.CLUSTER, description = "Information such as a 'pointer' to the current CDC event in the database is stored by this processor, such " + + "that it can continue from the same location if restarted.") +@WritesAttributes({ + @WritesAttribute(attribute = "cdc.sequence.id", description = "A sequence identifier (i.e. strictly increasing integer value) specifying the order " + + "of the CDC event flow file relative to the other event flow file(s)."), + @WritesAttribute(attribute = "cdc.event.type", description = "A string indicating the type of CDC event that occurred, including (but not limited to) " + + "'begin', 'write', 'update', 'delete', 'schema_change' and 'commit'."), + @WritesAttribute(attribute = "mime.type", description = "The processor outputs flow file content in JSON format, and sets the mime.type attribute to " + + "application/json") +}) +public class CaptureChangeMySQL extends AbstractSessionFactoryProcessor { + + // Random invalid constant used as an indicator to not set the binlog position on the client (thereby using the latest available) + private static final int DO_NOT_SET = -1000; + + // Relationships + public static final Relationship REL_SUCCESS = new Relationship.Builder() + .name("success") + .description("Successfully created FlowFile from SQL query result set.") + .build(); + + protected static Set<Relationship> relationships; + + // Properties + public static final PropertyDescriptor DATABASE_NAME_PATTERN = new PropertyDescriptor.Builder() + .name("capture-change-mysql-db-name-pattern") + .displayName("Database/Schema Name Pattern") + .description("A regular expression (regex) for matching databases or schemas (depending on your RDBMS' terminology) against the list of CDC events. The regex must match " + + "the schema name as it is stored in the database. If the property is not set, the schema name will not be used to filter the CDC events.") + .required(false) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + + public static final PropertyDescriptor TABLE_NAME_PATTERN = new PropertyDescriptor.Builder() + .name("capture-change-mysql-name-pattern") + .displayName("Table Name Pattern") + .description("A regular expression (regex) for matching CDC events affecting matching tables. The regex must match the table name as it is stored in the database. " + + "If the property is not set, no events will be filtered based on table name.") + .required(false) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + + public static final PropertyDescriptor CONNECT_TIMEOUT = new PropertyDescriptor.Builder() + .name("capture-change-mysql-max-wait-time") + .displayName("Max Wait Time") + .description("The maximum amount of time allowed for a connection to be established, " + + "zero means there is effectively no limit. Max time less than 1 second will be equal to zero.") + .defaultValue("0 seconds") --- End diff -- Hmm I used to have the default as 30 seconds, not sure where that code went :( Will make the change.
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