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https://issues.apache.org/jira/browse/NIFI-3413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15941183#comment-15941183
]
ASF GitHub Bot commented on NIFI-3413:
--------------------------------------
Github user phrocker commented on a diff in the pull request:
https://github.com/apache/nifi/pull/1618#discussion_r107910775
--- Diff:
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/db/event/TableInfoCacheKey.java
---
@@ -0,0 +1,95 @@
+/*
+ * 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.db.event;
+
+import
org.apache.nifi.distributed.cache.client.exception.SerializationException;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import static
org.apache.nifi.processors.standard.db.event.TableInfo.DB_TABLE_NAME_DELIMITER;
+
+/**
+ * This class represents a key in a cache that contains information
(column definitions, e.g.) for a database table
+ */
+public class TableInfoCacheKey {
+
+ private final String databaseName;
+ private final String tableName;
+ private final long tableId;
+ private final String uuidPrefix;
+
+ public TableInfoCacheKey(String uuidPrefix, String databaseName,
String tableName, long tableId) {
+ this.uuidPrefix = uuidPrefix;
+ this.databaseName = databaseName;
+ this.tableName = tableName;
+ this.tableId = tableId;
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ if (this == o) return true;
+ if (o == null || getClass() != o.getClass()) return false;
+
+ TableInfoCacheKey that = (TableInfoCacheKey) o;
+
+ if (tableId != that.tableId) return false;
+ if (databaseName != null ? !databaseName.equals(that.databaseName)
: that.databaseName != null) return false;
--- End diff --
what if that.databaseName is null? I don't believe java.lang.String checks
null. Could use EqualsBuilder from commons-lang, which does the null check
since commons-lang3 is in the pom.
> Implement a GetChangeDataCapture processor
> ------------------------------------------
>
> Key: NIFI-3413
> URL: https://issues.apache.org/jira/browse/NIFI-3413
> Project: Apache NiFi
> Issue Type: New Feature
> Components: Extensions
> Reporter: Matt Burgess
> Assignee: Matt Burgess
>
> Database systems such as MySQL, Oracle, and SQL Server allow access to their
> transactional logs and such, in order for external clients to have a "change
> data capture" (CDC) capability. I propose a GetChangeDataCapture processor to
> enable this in NiFi.
> The processor would be configured with a DBCPConnectionPool controller
> service, as well as a Database Type property (similar to the one in
> QueryDatabaseTable) for database-specific handling. Additional properties
> might include the CDC table name, etc. Additional database-specific
> properties could be handled using dynamic properties (and the documentation
> should reflect this).
> The processor would accept no incoming connections (it is a "Get" or source
> processor), would be intended to run on the primary node only as a single
> threaded processor, and would generate a flow file for each operation
> (INSERT, UPDATE, DELETE, e,g,) in one or some number of formats (JSON, e.g.).
> The flow files would be transferred in time order (to enable a replication
> solution, for example), perhaps with some auto-incrementing attribute to also
> indicate order if need be.
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