java包中接收器连接器的实现

Question

我已经启动了zookeeper，kafka服务器，kafka生产者和kafka消费者，我已经把从confluent下载的jdbc sql连接器jar放在路径中，我已经在connect-standalone properties.and中提到了plugin.path我已经运行了connect-Standalone.BAT....\config\connect-Standalone.properties...\config\sink quickstart-MYSQL.properties没有任何错误，但是它有很多警告并且没有开始，但是我的数据没有反映在tables.what中我错过了，你能帮我吗我有下面的警告

                                                                                                    org.reflections.ReflectionsException: could not get type for name io.netty.inter
nal.tcnative.SSLPrivateKeyMethod
        at org.reflections.ReflectionUtils.forName(ReflectionUtils.java:312)
        at org.reflections.Reflections.expandSuperTypes(Reflections.java:382)
        at org.reflections.Reflections.<init>(Reflections.java:140)
        at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader$Inte
rnalReflections.<init>(DelegatingClassLoader.java:433)
        at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader.scan
PluginPath(DelegatingClassLoader.java:325)
        at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader.scan
UrlsAndAddPlugins(DelegatingClassLoader.java:261)
        at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader.init
PluginLoader(DelegatingClassLoader.java:209)
        at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader.init
Loaders(DelegatingClassLoader.java:202)
        at org.apache.kafka.connect.runtime.isolation.Plugins.<init>(Plugins.jav
a:60)
        at org.apache.kafka.connect.cli.ConnectStandalone.main(ConnectStandalone
.java:79)
Caused by: java.lang.ClassNotFoundException: io.netty.internal.tcnative.SSLPriva
teKeyMethod
        at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
        at org.reflections.ReflectionUtils.forName(ReflectionUtils.java:310)
        ... 9 more

Answer 1

不需要自己写一个源连接器，除非你需要将kafka连接到一些奇怪的数据源。像mysql这样的流行工具已经被很好地覆盖了。confluent已经提供了一个"jdbc-connector“，它可以执行您想要的操作。

https://docs.confluent.io/current/connect/kafka-connect-jdbc/index.html

你需要一个可以正常工作的kafka-connect安装，然后你可以通过一个HTTP POST将你的mysql表“连接”到kafka connect API。只需在tables.whitelist属性中指定要用作源的表的逗号分隔列表。例如，像这样的东西....

curl -X POST $KAFKA_CONNECT_API/connectors -H "Content-Type: application/json" -d '{
      "name": "jdbc_source_mysql_01",
      "config": {
              "connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector",
              "connection.url": "jdbc:mysql://mysql:3306/test",
              "connection.user": "connect_user",
              "connection.password": "connect_password",
              "topic.prefix": "mysql-01-",
              "poll.interval.ms" : 3600000,
              "table.whitelist" : "test.accounts",
              "mode":"bulk"
              }
      }'