build fail

[githublaohu]

Logstash information:

Please include the following information:

1. Logstash version 7.13.1
2. Logstash installation source git clone
3. How is Logstash being run systemd
4. How was the Logstash Plugin installed

java 1.8

1. JVM version 1.8
2. JVM installation source jar
3. Value of the JAVA_HOME environment variable if set.

OS version (uname -a if on a Unix-like system):
ubuntu 18.04

/leaning/space-work/java-study/rocketmq-externals/logstash-output-rocketmq/src/main/java/org/logstashplugins/RocketMQ.java:3: 错误: 程序包co.elastic.logstash.api不存在 import co.elastic.logstash.api.Configuration;