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Enhancement Request

In the eventmesh-examples module,http and grpc are not code optimized

Describe the solution you'd like

We suggest that such constants be placed in a constant class and the constant class be placed in the eventmesh-examples/src/main/java/org/apache/eventmesh/common package

delete invalid code.
located in eventmesh-examples/src/main/java/org/apache/eventmesh/tcp/demo/sub/eventmeshmessage/AsyncSubscribe.java

Are you willing to submit PR?

• Yes I am willing to submit a PR!