1 files changed, 55 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/BaseProtocolPoller.java b/src/main/java/org/traccar/BaseProtocolPoller.java
new file mode 100644
index 000000000..be6556374
--- /dev/null
+++ b/src/main/java/org/traccar/BaseProtocolPoller.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2022 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.traccar;
+
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelDuplexHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.util.concurrent.Future;
+
+import java.net.SocketAddress;
+import java.util.concurrent.TimeUnit;
+
+public abstract class BaseProtocolPoller extends ChannelDuplexHandler {
+
+    private final long interval;
+    private Future<?> timeout;
+
+    public BaseProtocolPoller(long interval) {
+        this.interval = interval;
+    }
+
+    protected abstract void sendRequest(Channel channel, SocketAddress remoteAddress);
+
+    @Override
+    public void channelActive(ChannelHandlerContext ctx) throws Exception {
+        super.channelActive(ctx);
+        if (interval > 0) {
+            timeout = ctx.executor().scheduleAtFixedRate(
+                    () -> sendRequest(ctx.channel(), ctx.channel().remoteAddress()), 0, interval, TimeUnit.SECONDS);
+        }
+    }
+
+    @Override
+    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
+        super.channelInactive(ctx);
+        if (timeout != null) {
+            timeout.cancel(false);
+            timeout = null;
+        }
+    }
+
+}