refactor task/job executors

src/main/java/de/rwth/idsg/steve/config/BeanConfiguration.java

@@ -21,7 +21,6 @@
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SerializationFeature;
-import com.google.common.util.concurrent.ThreadFactoryBuilder;
 import com.mysql.cj.conf.PropertyKey;
 import com.zaxxer.hikari.HikariConfig;
 import com.zaxxer.hikari.HikariDataSource;
@@ -45,6 +44,8 @@
 import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
 import org.springframework.scheduling.annotation.EnableScheduling;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
 import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
 import org.springframework.web.accept.ContentNegotiationManager;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
@@ -55,16 +56,10 @@
 import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter;
 import org.springframework.web.servlet.view.InternalResourceViewResolver;
 
-import jakarta.annotation.PreDestroy;
 import jakarta.validation.Validator;
 
 import javax.sql.DataSource;
 import java.util.List;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.ScheduledThreadPoolExecutor;
-import java.util.concurrent.ThreadFactory;
-import java.util.concurrent.TimeUnit;
 
 import static de.rwth.idsg.steve.SteveConfiguration.CONFIG;
 
@@ -81,8 +76,6 @@
 @ComponentScan("de.rwth.idsg.steve")
 public class BeanConfiguration implements WebMvcConfigurer {
 
-    private ScheduledThreadPoolExecutor executor;
-
     /**
      * https://github.com/brettwooldridge/HikariCP/wiki/MySQL-Configuration
      */
@@ -144,13 +137,28 @@ public DSLContext dslContext(DataSource dataSource) {
         return DSL.using(conf);
     }
 
-    @Bean
-    public ScheduledExecutorService scheduledExecutorService() {
-        ThreadFactory threadFactory = new ThreadFactoryBuilder().setNameFormat("SteVe-Executor-%d")
-                                                                .build();
+    @Bean(destroyMethod = "close")
+    public DelegatingTaskScheduler asyncTaskScheduler() {
+        ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();
+        scheduler.setPoolSize(5);
+        scheduler.setThreadNamePrefix("SteVe-TaskScheduler-");
+        scheduler.setWaitForTasksToCompleteOnShutdown(true);
+        scheduler.setAwaitTerminationSeconds(30);
+        scheduler.initialize();
 
-        executor = new ScheduledThreadPoolExecutor(5, threadFactory);
-        return executor;
+        return new DelegatingTaskScheduler(scheduler);
+    }
+
+    @Bean(destroyMethod = "close")
+    public DelegatingTaskExecutor asyncTaskExecutor() {
+        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
+        executor.setCorePoolSize(5);
+        executor.setThreadNamePrefix("SteVe-TaskExecutor-");
+        executor.setWaitForTasksToCompleteOnShutdown(true);
+        executor.setAwaitTerminationSeconds(30);
+        executor.initialize();
+
+        return new DelegatingTaskExecutor(executor);
     }
 
     @Bean
@@ -173,29 +181,6 @@ public ReleaseCheckService releaseCheckService() {
         }
     }
 
-    @PreDestroy
-    public void shutDown() {
-        if (executor != null) {
-            gracefulShutDown(executor);
-        }
-    }
-
-    private void gracefulShutDown(ExecutorService executor) {
-        try {
-            executor.shutdown();
-            executor.awaitTermination(30, TimeUnit.SECONDS);
-
-        } catch (InterruptedException e) {
-            log.error("Termination interrupted", e);
-
-        } finally {
-            if (!executor.isTerminated()) {
-                log.warn("Killing non-finished tasks");
-            }
-            executor.shutdownNow();
-        }
-    }
-
     // -------------------------------------------------------------------------
     // Web config
     // -------------------------------------------------------------------------

src/main/java/de/rwth/idsg/steve/config/DelegatingTaskExecutor.java

@@ -0,0 +1,48 @@
+/*
+ * SteVe - SteckdosenVerwaltung - https://github.com/steve-community/steve
+ * Copyright (C) 2013-2025 SteVe Community Team
+ * All Rights Reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package de.rwth.idsg.steve.config;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+
+import java.io.Closeable;
+import java.io.IOException;
+
+/**
+ * @author Sevket Goekay <[email protected]>
+ * @since 02.02.2025
+ */
+@Slf4j
+@RequiredArgsConstructor
+public class DelegatingTaskExecutor implements Closeable {
+
+    private final ThreadPoolTaskExecutor delegate;
+
+    @Override
+    public void close() throws IOException {
+        log.info("Shutting down");
+        delegate.shutdown();
+    }
+
+    public void execute(Runnable task) {
+        delegate.execute(task);
+    }
+
+}

src/main/java/de/rwth/idsg/steve/config/DelegatingTaskScheduler.java

@@ -0,0 +1,51 @@
+/*
+ * SteVe - SteckdosenVerwaltung - https://github.com/steve-community/steve
+ * Copyright (C) 2013-2025 SteVe Community Team
+ * All Rights Reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package de.rwth.idsg.steve.config;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.time.Duration;
+import java.time.Instant;
+import java.util.concurrent.ScheduledFuture;
+
+/**
+ * @author Sevket Goekay <[email protected]>
+ * @since 02.02.2025
+ */
+@Slf4j
+@RequiredArgsConstructor
+public class DelegatingTaskScheduler implements Closeable {
+
+    private final ThreadPoolTaskScheduler delegate;
+
+    @Override
+    public void close() throws IOException {
+        log.info("Shutting down");
+        delegate.shutdown();
+    }
+
+    public ScheduledFuture<?> scheduleAtFixedRate(Runnable task, Instant startTime, Duration period) {
+        return delegate.scheduleAtFixedRate(task, startTime, period);
+    }
+
+}

src/main/java/de/rwth/idsg/steve/config/WebSocketConfiguration.java

@@ -51,7 +51,7 @@ public class WebSocketConfiguration implements WebSocketConfigurer {
     @Autowired private Ocpp16WebSocketEndpoint ocpp16WebSocketEndpoint;
 
     public static final String PATH_INFIX = "/websocket/CentralSystemService/";
-    public static final long PING_INTERVAL = TimeUnit.MINUTES.toMinutes(15);
+    public static final Duration PING_INTERVAL = Duration.ofMinutes(15);
     public static final Duration IDLE_TIMEOUT = Duration.ofHours(2);
     public static final int MAX_MSG_SIZE = 8_388_608; // 8 MB for max message size
 

src/main/java/de/rwth/idsg/steve/ocpp/soap/MessageHeaderInterceptor.java

@@ -18,6 +18,7 @@
  */
 package de.rwth.idsg.steve.ocpp.soap;
 
+import de.rwth.idsg.steve.config.DelegatingTaskExecutor;
 import de.rwth.idsg.steve.ocpp.OcppProtocol;
 import de.rwth.idsg.steve.repository.OcppServerRepository;
 import de.rwth.idsg.steve.repository.impl.ChargePointRepositoryImpl;
@@ -41,7 +42,6 @@
 
 import javax.xml.namespace.QName;
 import java.util.Optional;
-import java.util.concurrent.ScheduledExecutorService;
 
 import static org.apache.cxf.ws.addressing.JAXWSAConstants.ADDRESSING_PROPERTIES_INBOUND;
 
@@ -62,7 +62,7 @@ public class MessageHeaderInterceptor extends AbstractPhaseInterceptor<Message>
 
     @Autowired private OcppServerRepository ocppServerRepository;
     @Autowired private ChargePointHelperService chargePointHelperService;
-    @Autowired private ScheduledExecutorService executorService;
+    @Autowired private DelegatingTaskExecutor asyncTaskExecutor;
 
     private static final String BOOT_OPERATION_NAME = "BootNotification";
     private static final String CHARGEBOX_ID_HEADER = "ChargeBoxIdentity";
@@ -93,7 +93,7 @@ public void handleMessage(Message message) throws Fault {
         // 2. update endpoint
         // -------------------------------------------------------------------------
 
-        executorService.execute(() -> {
+        asyncTaskExecutor.execute(() -> {
             try {
                 String endpointAddress = getEndpointAddress(message);
                 if (endpointAddress != null) {

src/main/java/de/rwth/idsg/steve/ocpp/ws/AbstractWebSocketEndpoint.java

@@ -20,6 +20,7 @@
 
 import com.google.common.base.Strings;
 import de.rwth.idsg.steve.config.WebSocketConfiguration;
+import de.rwth.idsg.steve.config.DelegatingTaskScheduler;
 import de.rwth.idsg.steve.ocpp.OcppTransport;
 import de.rwth.idsg.steve.ocpp.OcppVersion;
 import de.rwth.idsg.steve.ocpp.ws.data.CommunicationContext;
@@ -39,14 +40,13 @@
 import org.springframework.web.socket.WebSocketMessage;
 import org.springframework.web.socket.WebSocketSession;
 
+import java.time.Instant;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Deque;
 import java.util.List;
 import java.util.Map;
-import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.ScheduledFuture;
-import java.util.concurrent.TimeUnit;
 import java.util.function.Consumer;
 
 /**
@@ -55,7 +55,7 @@
  */
 public abstract class AbstractWebSocketEndpoint extends ConcurrentWebSocketHandler implements SubProtocolCapable {
 
-    @Autowired private ScheduledExecutorService service;
+    @Autowired private DelegatingTaskScheduler asyncTaskScheduler;
     @Autowired private OcppServerRepository ocppServerRepository;
     @Autowired private FutureResponseContextStore futureResponseContextStore;
     @Autowired private ApplicationEventPublisher applicationEventPublisher;
@@ -131,11 +131,11 @@ public void onOpen(WebSocketSession session) throws Exception {
 
         // Just to keep the connection alive, such that the servers do not close
         // the connection because of a idle timeout, we ping-pong at fixed intervals.
-        ScheduledFuture pingSchedule = service.scheduleAtFixedRate(
+        ScheduledFuture pingSchedule = asyncTaskScheduler.scheduleAtFixedRate(
                 new PingTask(chargeBoxId, session),
-                WebSocketConfiguration.PING_INTERVAL,
-                WebSocketConfiguration.PING_INTERVAL,
-                TimeUnit.MINUTES);
+                Instant.now().plus(WebSocketConfiguration.PING_INTERVAL),
+                WebSocketConfiguration.PING_INTERVAL
+        );
 
         futureResponseContextStore.addSession(session);
 

src/main/java/de/rwth/idsg/steve/service/BackgroundService.java

@@ -18,12 +18,12 @@
  */
 package de.rwth.idsg.steve.service;
 
+import de.rwth.idsg.steve.config.DelegatingTaskExecutor;
 import de.rwth.idsg.steve.repository.dto.ChargePointSelect;
 import lombok.AccessLevel;
 import lombok.RequiredArgsConstructor;
 
 import java.util.List;
-import java.util.concurrent.ExecutorService;
 import java.util.function.Consumer;
 
 /**
@@ -32,10 +32,11 @@
  */
 @RequiredArgsConstructor
 public class BackgroundService {
-    private final ExecutorService executorService;
 
-    public static BackgroundService with(ExecutorService executorService) {
-        return new BackgroundService(executorService);
+    private final DelegatingTaskExecutor asyncTaskExecutor;
+
+    public static BackgroundService with(DelegatingTaskExecutor asyncTaskExecutor) {
+        return new BackgroundService(asyncTaskExecutor);
     }
 
     public Runner forFirst(List<ChargePointSelect> list) {
@@ -56,7 +57,7 @@ private class BackgroundSingleRunner implements Runner {
 
         @Override
         public void execute(Consumer<ChargePointSelect> consumer) {
-            executorService.execute(() -> consumer.accept(cps));
+            asyncTaskExecutor.execute(() -> consumer.accept(cps));
         }
     }
 
@@ -66,7 +67,7 @@ private class BackgroundListRunner implements Runner {
 
         @Override
         public void execute(Consumer<ChargePointSelect> consumer) {
-            executorService.execute(() -> list.forEach(consumer));
+            asyncTaskExecutor.execute(() -> list.forEach(consumer));
         }
     }
 }