[KAFKA] Adding new client code

Signed-off-by: david.mcweeney <david.mcweeney@est.tech>
Change-Id: I38b930b1b5f4233f961d51bbab4b1828d034e67a
Issue-ID: DMAAP-1847

5 files changed, 184 insertions, 0 deletions

diff --git a/sampleClient/pom.xml b/sampleClient/pom.xml
new file mode 100644
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--- /dev/null
+++ b/sampleClient/pom.xml
@@ -0,0 +1,70 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.onap.dmaap.kafka</groupId>
+    <artifactId>parent</artifactId>
+    <version>${revision}</version>
+    <relativePath>../pom.xml</relativePath>
+  </parent>
+  <artifactId>onap-kafka-client-sample</artifactId>
+  <description>Sample project for client users</description>
+
+  <properties>
+    <maven.compiler.source>11</maven.compiler.source>
+    <maven.compiler.target>11</maven.compiler.target>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.onap.dmaap.kafka</groupId>
+      <artifactId>onap-kafka-client</artifactId>
+      <version>0.0.1-SNAPSHOT</version>
+      <exclusions>
+        <exclusion>
+          <groupId>org.slf4j</groupId>
+          <artifactId>slf4j-api</artifactId>
+        </exclusion>
+        <exclusion>
+          <groupId>ch.qos.logback</groupId>
+          <artifactId>logback-core</artifactId>
+        </exclusion>
+      </exclusions>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>ch.qos.logback</groupId>
+      <artifactId>logback-classic</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.projectlombok</groupId>
+      <artifactId>lombok</artifactId>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot</artifactId>
+      <version>2.7.7</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-starter</artifactId>
+      <version>2.7.7</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-autoconfigure</artifactId>
+      <version>2.7.7</version>
+      <scope>compile</scope>
+    </dependency>
+  </dependencies>
+  <build>
+    <plugins>
+    </plugins>
+  </build>
+</project>
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diff --git a/sampleClient/src/main/java/org/onap/dmaap/kafka/sample/Main.java b/sampleClient/src/main/java/org/onap/dmaap/kafka/sample/Main.java
new file mode 100644
index 0000000..37a3097
--- /dev/null
+++ b/sampleClient/src/main/java/org/onap/dmaap/kafka/sample/Main.java
@@ -0,0 +1,44 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * dmaap-kafka-client
+ * ================================================================================
+ * Copyright (C) 2023 Nordix Foundation. All rights reserved.
+ * ================================================================================
+ * Licensed 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.dmaap.kafka.sample;
+
+import org.onap.dmaap.kafka.OnapKafkaClient;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Main implements CommandLineRunner{
+
+    @Autowired
+    private SampleConfiguration configuration;
+
+    public static void main(String[] args) {
+        SpringApplication.run(Main.class, args);
+    }
+
+    @Override
+    public void run(String... args) {
+        OnapKafkaClient handler = new OnapKafkaClient(configuration);
+        handler.fetchFromTopic("dummy.topic.blah");
+    }
+}
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diff --git a/sampleClient/src/main/java/org/onap/dmaap/kafka/sample/SampleConfiguration.java b/sampleClient/src/main/java/org/onap/dmaap/kafka/sample/SampleConfiguration.java
new file mode 100644
index 0000000..0cb5498
--- /dev/null
+++ b/sampleClient/src/main/java/org/onap/dmaap/kafka/sample/SampleConfiguration.java
@@ -0,0 +1,48 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * dmaap-kafka-client
+ * ================================================================================
+ * Copyright (C) 2023 Nordix Foundation. All rights reserved.
+ * ================================================================================
+ * Licensed 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.dmaap.kafka.sample;
+
+import java.util.List;
+import lombok.Getter;
+import lombok.NonNull;
+import lombok.Setter;
+import org.onap.dmaap.kafka.IKafkaConfig;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ConfigurationProperties(prefix = "kafka")
+@Getter
+@Setter
+public class SampleConfiguration implements IKafkaConfig {
+
+    @NonNull
+    private List<String> kafkaBootstrapServers;
+
+    private List<String> consumerTopics;
+    private String consumerGroup;
+    private String consumerID;
+    private int pollingTimeout;
+
+    private List<String> producerTopics;
+    private String kafkaSaslJaasConfig;
+    // private String kafkaSaslMechanism;
+}
diff --git a/sampleClient/src/main/resources/application.yaml b/sampleClient/src/main/resources/application.yaml
new file mode 100644
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+++ b/sampleClient/src/main/resources/application.yaml
@@ -0,0 +1,11 @@
+kafka:
+  kafkaBootstrapServers: [localhost:9092]
+  pollingTimeout: 10
+  consumerGroup: my-consumer-group
+  consumerID: my-consumer-id
+  consumerTopics: [test.mytopic.1, test.mytopic.2]
+  producerTopics: [test.mytopic.3]
+  kafkaSaslJaasConfig: ${SASL_JAAS_CONFIG:org.apache.kafka.common.security.scram.ScramLoginModule required username=admin password=admin-secret;}
+
+  #kafkaSaslJaasConfig: ${SASL_JAAS_CONFIG:org.apache.kafka.common.security.plain.PlainLoginModule required username=admin password=admin-secret;}
+  #kafkaSaslMechanism: ${SASL_MECHANISM:PLAIN}
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diff --git a/sampleClient/src/main/resources/logback.xml b/sampleClient/src/main/resources/logback.xml
new file mode 100644
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+++ b/sampleClient/src/main/resources/logback.xml
@@ -0,0 +1,11 @@
+<configuration>
+  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+    <encoder>
+      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger - %msg%n</pattern>
+    </encoder>
+  </appender>
+
+  <root level="INFO">
+    <appender-ref ref="STDOUT"/>
+  </root>
+</configuration>
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