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1   package com.atlassian.messagequeue.registry;
2   
3   import com.atlassian.annotations.PublicApi;
4   import com.atlassian.messagequeue.MessageRunnerKey;
5   
6   /**
7    * Interface for registering and unregistering message runners.
8    *
9    * @since 1.0
10   */
11  @PublicApi
12  public interface MessageRunnerRegistryService {
13  
14      /**
15       * Register a message runner on the given key. Registering a new runner for the same key replaces the old runner.
16       * @param messageRunnerKey unique message runner key
17       * @param messageRunner MessageRunner implementation
18       */
19      void registerMessageRunner(MessageRunnerKey messageRunnerKey, MessageRunner messageRunner);
20  
21      /**
22       * Unregister a message runner that has previously been registered on the key. If no runner is registered, logs a
23       * warning only.
24       * @param messageRunnerKey unique message runner key
25       */
26      void unregisterMessageRunner(MessageRunnerKey messageRunnerKey);
27  }