QueueKey toString for better logging experience

common/queue/src/main/java/org/thingsboard/server/queue/discovery/QueueKey.java

@@ -53,4 +53,11 @@ public class QueueKey {
         this.queueName = MAIN;
         this.tenantId = TenantId.SYS_TENANT_ID;
     }
+
+    @Override
+    public String toString() {
+        return "QK(" + queueName + "," + type + "," +
+                (TenantId.SYS_TENANT_ID.equals(tenantId) ? "system" : tenantId) +
+                ')';
+    }
 }

common/queue/src/test/java/org/thingsboard/server/queue/discovery/QueueKeyTest.java

@@ -0,0 +1,44 @@
+/**
+ * Copyright © 2016-2022 The Thingsboard Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.thingsboard.server.queue.discovery;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+import org.thingsboard.server.common.data.id.TenantId;
+import org.thingsboard.server.common.msg.queue.ServiceType;
+
+import java.util.UUID;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@Slf4j
+class QueueKeyTest {
+
+    @Test
+    void testToStringSystemTenant() {
+        QueueKey queueKey = new QueueKey(ServiceType.TB_RULE_ENGINE, "Main", TenantId.SYS_TENANT_ID);
+        log.info("The queue key is {}",queueKey);
+        assertThat(queueKey.toString()).isEqualTo("QK(Main,TB_RULE_ENGINE,system)");
+    }
+
+    @Test
+    void testToStringCustomTenant() {
+        TenantId tenantId = TenantId.fromUUID(UUID.fromString("3ebd39eb-43d4-4911-a818-cdbf8d508f88"));
+        QueueKey queueKey = new QueueKey(ServiceType.TB_RULE_ENGINE, "Main", tenantId);
+        log.info("The queue key is {}",queueKey);
+        assertThat(queueKey.toString()).isEqualTo("QK(Main,TB_RULE_ENGINE,3ebd39eb-43d4-4911-a818-cdbf8d508f88)");
+    }
+}