added env variable to regulate pubsud queue executor threads pool size

application/src/main/resources/thingsboard.yml

@@ -1411,6 +1411,8 @@ queue:
     max_msg_size: "${TB_QUEUE_PUBSUB_MAX_MSG_SIZE:1048576}"
     # Number of messages per consumer
     max_messages: "${TB_QUEUE_PUBSUB_MAX_MESSAGES:1000}"
+    # Number of threads of pubsub executor provider
+    executor_thread_pool_size: "${TB_QUEUE_PUBSUB_EXECUTOR_THREAD_SIZE:50}"
     queue-properties:
       # Pub/Sub properties for Rule Engine subscribers, messages which will commit after ackDeadlineInSec period can be consumed again
       rule-engine: "${TB_QUEUE_PUBSUB_RE_QUEUE_PROPERTIES:ackDeadlineInSec:30;messageRetentionInSec:604800}"

common/queue/src/main/java/org/thingsboard/server/queue/pubsub/TbPubSubProducerTemplate.java

@@ -18,6 +18,7 @@ package org.thingsboard.server.queue.pubsub;
 import com.google.api.core.ApiFuture;
 import com.google.api.core.ApiFutureCallback;
 import com.google.api.core.ApiFutures;
+import com.google.api.gax.core.InstantiatingExecutorProvider;
 import com.google.cloud.pubsub.v1.Publisher;
 import com.google.gson.Gson;
 import com.google.protobuf.ByteString;
@@ -120,7 +121,14 @@ public class TbPubSubProducerTemplate<T extends TbQueueMsg> implements TbQueuePr
             try {
                 admin.createTopicIfNotExists(topic);
                 ProjectTopicName topicName = ProjectTopicName.of(pubSubSettings.getProjectId(), topic);
-                Publisher publisher = Publisher.newBuilder(topicName).setCredentialsProvider(pubSubSettings.getCredentialsProvider()).build();
+                InstantiatingExecutorProvider executorProvider =
+                        InstantiatingExecutorProvider.newBuilder()
+                                .setExecutorThreadCount(pubSubSettings.getExecutorThreadPoolSize())
+                                .build();
+                Publisher publisher = Publisher.newBuilder(topicName)
+                        .setCredentialsProvider(pubSubSettings.getCredentialsProvider())
+                        .setExecutorProvider(executorProvider)
+                        .build();
                 publisherMap.put(topic, publisher);
                 return publisher;
             } catch (IOException e) {

common/queue/src/main/java/org/thingsboard/server/queue/pubsub/TbPubSubSettings.java

@@ -46,6 +46,9 @@ public class TbPubSubSettings {
     @Value("${queue.pubsub.max_messages}")
     private int maxMessages;
 
+    @Value("${queue.pubsub.executor_thread_pool_size}")
+    private int executorThreadPoolSize;
+
     private CredentialsProvider credentialsProvider;
 
     @PostConstruct

msa/vc-executor/src/main/resources/tb-vc-executor.yml

@@ -172,6 +172,8 @@ queue:
     max_msg_size: "${TB_QUEUE_PUBSUB_MAX_MSG_SIZE:1048576}" #in bytes
     # Number of messages per consumer
     max_messages: "${TB_QUEUE_PUBSUB_MAX_MESSAGES:1000}"
+    # Number of threads of pubsub executor provider
+    executor_thread_pool_size: "${TB_QUEUE_PUBSUB_EXECUTOR_THREAD_SIZE:50}"
     queue-properties:
       # Pub/Sub properties for Core subscribers, messages which will commit after ackDeadlineInSec period can be consumed again
       core: "${TB_QUEUE_PUBSUB_CORE_QUEUE_PROPERTIES:ackDeadlineInSec:30;messageRetentionInSec:604800}"

transport/coap/src/main/resources/tb-coap-transport.yml

@@ -295,6 +295,8 @@ queue:
     max_msg_size: "${TB_QUEUE_PUBSUB_MAX_MSG_SIZE:1048576}"
     # Number of messages per consumer
     max_messages: "${TB_QUEUE_PUBSUB_MAX_MESSAGES:1000}"
+    # Number of threads of pubsub executor provider
+    executor_thread_pool_size: "${TB_QUEUE_PUBSUB_EXECUTOR_THREAD_SIZE:50}"
     queue-properties:
       # Pub/Sub properties for Rule Engine subscribers, messages which will commit after ackDeadlineInSec period can be consumed again
       rule-engine: "${TB_QUEUE_PUBSUB_RE_QUEUE_PROPERTIES:ackDeadlineInSec:30;messageRetentionInSec:604800}"

transport/http/src/main/resources/tb-http-transport.yml

@@ -278,6 +278,8 @@ queue:
     max_msg_size: "${TB_QUEUE_PUBSUB_MAX_MSG_SIZE:1048576}"
     # Number of messages per a consumer
     max_messages: "${TB_QUEUE_PUBSUB_MAX_MESSAGES:1000}"
+    # Number of threads of pubsub executor provider
+    executor_thread_pool_size: "${TB_QUEUE_PUBSUB_EXECUTOR_THREAD_SIZE:50}"
     queue-properties:
       # Pub/Sub properties for Rule Engine subscribers, messages which will commit after ackDeadlineInSec period can be consume again
       rule-engine: "${TB_QUEUE_PUBSUB_RE_QUEUE_PROPERTIES:ackDeadlineInSec:30;messageRetentionInSec:604800}"

transport/lwm2m/src/main/resources/tb-lwm2m-transport.yml

@@ -374,6 +374,8 @@ queue:
     max_msg_size: "${TB_QUEUE_PUBSUB_MAX_MSG_SIZE:1048576}"
     # Number of messages per consumer
     max_messages: "${TB_QUEUE_PUBSUB_MAX_MESSAGES:1000}"
+    # Number of threads of pubsub executor provider
+    executor_thread_pool_size: "${TB_QUEUE_PUBSUB_EXECUTOR_THREAD_SIZE:50}"
     queue-properties:
       # Pub/Sub properties for Rule Engine subscribers, messages which will commit after ackDeadlineInSec period can be consumed again
       rule-engine: "${TB_QUEUE_PUBSUB_RE_QUEUE_PROPERTIES:ackDeadlineInSec:30;messageRetentionInSec:604800}"

transport/mqtt/src/main/resources/tb-mqtt-transport.yml

@@ -311,6 +311,8 @@ queue:
     max_msg_size: "${TB_QUEUE_PUBSUB_MAX_MSG_SIZE:1048576}"
     # Number of messages per consumer
     max_messages: "${TB_QUEUE_PUBSUB_MAX_MESSAGES:1000}"
+    # Number of threads of pubsub executor provider
+    executor_thread_pool_size: "${TB_QUEUE_PUBSUB_EXECUTOR_THREAD_SIZE:50}"
     queue-properties:
       # Pub/Sub properties for Rule Engine subscribers, messages which will commit after ackDeadlineInSec period can be consumed again
       rule-engine: "${TB_QUEUE_PUBSUB_RE_QUEUE_PROPERTIES:ackDeadlineInSec:30;messageRetentionInSec:604800}"

transport/snmp/src/main/resources/tb-snmp-transport.yml

@@ -264,6 +264,8 @@ queue:
     max_msg_size: "${TB_QUEUE_PUBSUB_MAX_MSG_SIZE:1048576}"
     # Number of messages per consumer
     max_messages: "${TB_QUEUE_PUBSUB_MAX_MESSAGES:1000}"
+    # Number of threads of pubsub executor provider
+    executor_thread_pool_size: "${TB_QUEUE_PUBSUB_EXECUTOR_THREAD_SIZE:50}"
     queue-properties:
       # Pub/Sub properties for Rule Engine subscribers, messages which will commit after ackDeadlineInSec period can be consumed again
       rule-engine: "${TB_QUEUE_PUBSUB_RE_QUEUE_PROPERTIES:ackDeadlineInSec:30;messageRetentionInSec:604800}"