Executor ID to provide more unique executor identifier

with initial implementation for AWS ECS

libs/micronaut-worker-executor-redis/src/main/java/com/agorapulse/worker/redis/RedisJobExecutor.java

@@ -21,6 +21,7 @@
 import com.agorapulse.worker.JobConfiguration;
 import com.agorapulse.worker.JobManager;
 import com.agorapulse.worker.executor.DistributedJobExecutor;
+import com.agorapulse.worker.executor.ExecutorId;
 import io.lettuce.core.ScriptOutputType;
 import io.lettuce.core.api.StatefulRedisConnection;
 import io.lettuce.core.api.async.RedisAsyncCommands;
@@ -31,7 +32,6 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import jakarta.inject.Named;
 import jakarta.inject.Singleton;
 import reactor.core.publisher.Mono;
 import reactor.core.scheduler.Schedulers;
@@ -71,13 +71,13 @@ public class RedisJobExecutor implements DistributedJobExecutor {
     private static final String DECREASE_JOB_COUNT = "return redis.call('decr', KEYS[1])";
 
     private final StatefulRedisConnection<String, String> connection;
-    private final String hostname;
+    private final ExecutorId executorId;
     private final BeanContext beanContext;
     private final JobManager jobManager;
 
-    public RedisJobExecutor(StatefulRedisConnection<String, String> connection, @Named(HOSTNAME_PARAMETER_NAME) String hostname, BeanContext beanContext, JobManager jobManager) {
+    public RedisJobExecutor(StatefulRedisConnection<String, String> connection, ExecutorId executorId, BeanContext beanContext, JobManager jobManager) {
         this.connection = connection;
-        this.hostname = hostname;
+        this.executorId = executorId;
         this.beanContext = beanContext;
         this.jobManager = jobManager;
     }
@@ -87,7 +87,7 @@ public <R> Publisher<R> executeOnlyOnLeader(String jobName, Callable<R> supplier
         RedisAsyncCommands<String, String> commands = connection.async();
 
         return readMasterHostname(jobName, commands).flatMap(h -> {
-            if (hostname.equals(h)) {
+            if (executorId.id().equals(h)) {
                 return Mono.fromCallable(supplier).subscribeOn(Schedulers.fromExecutorService(getExecutorService(jobName)));
             }
             return Mono.empty();
@@ -114,7 +114,7 @@ public <R> Publisher<R> executeConcurrently(String jobName, int maxConcurrency,
     public <R> Publisher<R> executeOnlyOnFollower(String jobName, Callable<R> supplier) {
         RedisAsyncCommands<String, String> commands = connection.async();
         return readMasterHostname(jobName, commands).flatMap(h -> {
-            if (!"".equals(h) && h.equals(hostname)) {
+            if (!"".equals(h) && h.equals(executorId.id())) {
                 return Mono.empty();
             }
             return Mono.fromCallable(supplier).subscribeOn(Schedulers.fromExecutorService(getExecutorService(jobName)));
@@ -142,7 +142,7 @@ private Mono<Object> readMasterHostname(String jobName, RedisAsyncCommands<Strin
         return Mono.fromFuture(commands.eval(
             LEADER_CHECK,
             ScriptOutputType.VALUE,
-            PREFIX_LEADER + jobName, hostname, String.valueOf(LEADER_INACTIVITY_TIMEOUT)
+            PREFIX_LEADER + jobName, executorId.id(), String.valueOf(LEADER_INACTIVITY_TIMEOUT)
         ).toCompletableFuture()).defaultIfEmpty("");
     }
 

libs/micronaut-worker/src/main/java/com/agorapulse/worker/executor/ExecutorId.java

@@ -0,0 +1,7 @@
+package com.agorapulse.worker.executor;
+
+/**
+ * Unique identifier of the executor.
+ * @param id unique identifier of the executor
+ */
+public record ExecutorId(String id) { }

libs/micronaut-worker-executor-redis/src/main/java/com/agorapulse/worker/redis/HostnameFactory.java → libs/micronaut-worker/src/main/java/com/agorapulse/worker/executor/HostnameExecutorIdFactory.java

@@ -15,27 +15,27 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.agorapulse.worker.redis;
+package com.agorapulse.worker.executor;
 
 import io.micronaut.context.annotation.Bean;
 import io.micronaut.context.annotation.Factory;
-
-import jakarta.inject.Named;
+import io.micronaut.context.annotation.Secondary;
 import jakarta.inject.Singleton;
+
 import java.net.InetAddress;
 import java.net.UnknownHostException;
 
 @Factory
-public class HostnameFactory {
+public class HostnameExecutorIdFactory {
 
     @Bean
     @Singleton
-    @Named(RedisJobExecutor.HOSTNAME_PARAMETER_NAME)
-    public String hostname() {
+    @Secondary
+    public ExecutorId hostname() {
         try {
-            return InetAddress.getLocalHost().getHostName();
+            return new ExecutorId(InetAddress.getLocalHost().getHostName());
         } catch (UnknownHostException ignored) {
-            return "localhost";
+            return new ExecutorId("localhost");
         }
     }
 

libs/micronaut-worker/src/main/java/com/agorapulse/worker/executor/ecs/EcsExecutorIdFactory.java

@@ -0,0 +1,25 @@
+package com.agorapulse.worker.executor.ecs;
+
+import com.agorapulse.worker.executor.ExecutorId;
+import io.micronaut.context.annotation.Bean;
+import io.micronaut.context.annotation.Factory;
+import io.micronaut.context.annotation.Requires;
+import io.micronaut.context.annotation.Value;
+import jakarta.inject.Singleton;
+
+@Factory
+@Requires(property = "ecs.agent.uri")
+public class EcsExecutorIdFactory {
+
+    @Bean
+    @Singleton
+    public ExecutorId ecsExecutorId(@Value("${ecs.agent.uri}") String ecsAgentUri) {
+        return new ExecutorId(extractId(ecsAgentUri));
+    }
+
+    private static String extractId(String ecsAgentUri) {
+        return ecsAgentUri.substring(ecsAgentUri.lastIndexOf('/') + 1, ecsAgentUri.lastIndexOf("-"));
+    }
+
+
+}

libs/micronaut-worker/src/test/groovy/com/agorapulse/worker/executor/ecs/EcsExecutorIdFactorySpec.groovy

@@ -0,0 +1,15 @@
+package com.agorapulse.worker.executor.ecs
+
+import com.agorapulse.worker.executor.ExecutorId
+import spock.lang.Specification
+
+class EcsExecutorIdFactorySpec extends Specification {
+
+    void 'extract id'() {
+        given:
+            String id = 'http://169.254.170.2/api/c613006db31d4ac192bbb07b1577c40e-1280352332'
+        expect:
+            new EcsExecutorIdFactory().ecsExecutorId(id) == new ExecutorId('c613006db31d4ac192bbb07b1577c40e')
+    }
+
+}