You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@camel.apache.org by ac...@apache.org on 2020/05/19 16:01:30 UTC
[camel-kafka-connector-examples] branch cql-source created (now
0f11c45)
This is an automated email from the ASF dual-hosted git repository.
acosentino pushed a change to branch cql-source
in repository https://gitbox.apache.org/repos/asf/camel-kafka-connector-examples.git.
at 0f11c45 Added a CQL Source connector example
This branch includes the following new commits:
new 0f11c45 Added a CQL Source connector example
The 1 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails. The revisions
listed as "add" were already present in the repository and have only
been added to this reference.
[camel-kafka-connector-examples] 01/01: Added a CQL Source
connector example
Posted by ac...@apache.org.
This is an automated email from the ASF dual-hosted git repository.
acosentino pushed a commit to branch cql-source
in repository https://gitbox.apache.org/repos/asf/camel-kafka-connector-examples.git
commit 0f11c45c59db21023f00c792b99796dc3e30270a
Author: Andrea Cosentino <an...@gmail.com>
AuthorDate: Tue May 19 18:00:59 2020 +0200
Added a CQL Source connector example
---
cql/cql-source/README.md | 112 +++++++++++++++++++++
.../CamelCassandraQLSourceConnector.properties | 30 ++++++
2 files changed, 142 insertions(+)
diff --git a/cql/cql-source/README.md b/cql/cql-source/README.md
new file mode 100644
index 0000000..e98f21d
--- /dev/null
+++ b/cql/cql-source/README.md
@@ -0,0 +1,112 @@
+# Camel-Kafka-connector CQL Source
+
+## Introduction
+
+This is an example for Camel-Kafka-connector CQL
+
+## What is needed
+
+- A Cassandra instance
+
+## Running Kafka
+
+```
+$KAFKA_HOME/bin/zookeeper-server-start.sh config/zookeeper.properties
+$KAFKA_HOME/bin/kafka-server-start.sh config/server.properties
+$KAFKA_HOME/bin/kafka-topics.sh --create --bootstrap-server localhost:9092 --replication-factor 1 --partitions 1 --topic mytopic
+```
+
+## Setting up the needed bits and running the example
+
+You'll need to setup the plugin.path property in your kafka
+
+Open the `$KAFKA_HOME/config/connect-standalone.properties`
+
+and set the `plugin.path` property to your choosen location
+
+In this example we'll use `/home/oscerd/connectors/`
+
+```
+> cd /home/oscerd/connectors/
+> wget https://repo1.maven.org/maven2/org/apache/camel/kafkaconnector/camel-cql-kafka-connector/0.1.0/camel-cql-kafka-connector-0.1.0-package.zip
+> unzip camel-cql-kafka-connector-0.1.0-package.zip
+```
+
+## Setting up Apache Cassandra
+
+This examples require a running Cassandra instance, for simplicity the steps below show how to start Cassandra using Docker. First you'll need to run a Cassandra instance:
+
+[source,bash]
+----
+docker run --name master_node --env MAX_HEAP_SIZE='800M' -dt oscerd/cassandra
+----
+
+Next, check and make sure Cassandra is running:
+
+[source,bash]
+----
+docker exec -ti master_node /opt/cassandra/bin/nodetool status
+Datacenter: datacenter1
+=======================
+Status=Up/Down
+|/ State=Normal/Leaving/Joining/Moving
+-- Address Load Tokens Owns (effective) Host ID Rack
+UN 172.17.0.2 251.32 KiB 256 100.0% 5126aaad-f143-43e9-920a-0f9540a93967 rack1
+----
+
+To populate the database using to the `cqlsh` tool, you'll need a local installation of Cassandra. Download and extract the Apache Cassandra distribution to a directory. We reference the Cassandra installation directory with `LOCAL_CASSANDRA_HOME`. Here we use version 3.11.4 to connect to the Cassandra instance we started using Docker.
+
+[source,bash]
+----
+<LOCAL_CASSANDRA_HOME>/bin/cqlsh $(docker inspect --format='{{ .NetworkSettings.IPAddress }}' master_node)
+----
+
+Next, execute the following script to create keyspace `test`, the table `users` and insert one row into it.
+
+[source,bash]
+----
+create keyspace test with replication = {'class':'SimpleStrategy', 'replication_factor':3};
+use test;
+create table users ( id int primary key, name text );
+insert into users (id,name) values (1, 'oscerd');
+quit;
+----
+
+In the configuration `.properties` file we use below the IP address of the Cassandra master node needs to be configured, replace the value `172.17.0.2` configuration property with the IP of the master node obtained from Docker. Each example uses a different `.properties` file shown in the command line to run the example.
+
+[source,bash]
+----
+docker inspect --format='{{ .NetworkSettings.IPAddress }}' master_node
+----
+
+Now it's time to setup the connectors
+
+Open the CQL Source configuration file
+
+```
+name=CamelCassandraQLSourceConnector
+connector.class=org.apache.camel.kafkaconnector.cql.CamelCqlSourceConnector
+key.converter=org.apache.kafka.connect.storage.StringConverter
+value.converter=org.apache.kafka.connect.storage.StringConverter
+
+camel.source.kafka.topic=mytopic
+
+camel.source.path.hosts=172.17.0.2
+camel.source.path.keyspace=9042/test
+camel.source.endpoint.cql=select * from users
+```
+
+Now you can run the example
+
+```
+$KAFKA_HOME/bin/connect-standalone.sh $KAFKA_HOME/config/connect-standalone.properties config/CamelCassandraQLSourceConnector.properties
+```
+
+On a different terminal run the kafka-consumer and you should see messages to Kafka from Cassandra
+
+```
+bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic mytopic --from-beginning
+[Row[1, oscerd]]
+```
+You can verify the behavior through the following command
+
diff --git a/cql/cql-source/config/CamelCassandraQLSourceConnector.properties b/cql/cql-source/config/CamelCassandraQLSourceConnector.properties
new file mode 100644
index 0000000..7346b56
--- /dev/null
+++ b/cql/cql-source/config/CamelCassandraQLSourceConnector.properties
@@ -0,0 +1,30 @@
+#
+# 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.
+#
+
+name=CamelCassandraQLSourceConnector
+connector.class=org.apache.camel.kafkaconnector.cql.CamelCqlSourceConnector
+key.converter=org.apache.kafka.connect.storage.StringConverter
+value.converter=org.apache.kafka.connect.storage.StringConverter
+
+camel.source.kafka.topic=mytopic
+
+camel.source.path.hosts=172.17.0.2
+camel.source.path.keyspace=9042/test
+camel.source.endpoint.cql=select * from users
+camel.source.endpoint.delay=10000
+
+