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authorAnton Tananaev <anton@traccar.org>2023-03-21 13:40:50 -0700
committerAnton Tananaev <anton@traccar.org>2023-03-21 13:40:58 -0700
commit2a0b2dee5eecd55f86c51fe2a25f7ac7484d6bde (patch)
treed0f187702e2b665b008de55e2467c6133d8ff17f /src/main/java/org/traccar/handler/AcknowledgementHandler.java
parent376df800e0f96b5237640420f7323a5980c0852b (diff)
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Response after position processed
Diffstat (limited to 'src/main/java/org/traccar/handler/AcknowledgementHandler.java')
-rw-r--r--src/main/java/org/traccar/handler/AcknowledgementHandler.java121
1 files changed, 121 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/handler/AcknowledgementHandler.java b/src/main/java/org/traccar/handler/AcknowledgementHandler.java
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@@ -0,0 +1,121 @@
+/*
+ * Copyright 2023 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.handler;
+
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelOutboundHandlerAdapter;
+import io.netty.channel.ChannelPromise;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Set;
+
+public class AcknowledgementHandler extends ChannelOutboundHandlerAdapter {
+
+ private static final Logger LOGGER = LoggerFactory.getLogger(AcknowledgementHandler.class);
+
+ public interface Event {
+ }
+
+ public static class EventReceived implements Event {
+ }
+
+ public static class EventDecoded implements Event {
+ private final Collection<Object> objects;
+
+ public EventDecoded(Collection<Object> objects) {
+ this.objects = objects;
+ }
+
+ public Collection<Object> getObjects() {
+ return objects;
+ }
+ }
+
+ public static class EventHandled implements Event {
+ private final Object object;
+
+ public EventHandled(Object object) {
+ this.object = object;
+ }
+
+ public Object getObject() {
+ return object;
+ }
+ }
+
+ private static class Entry {
+ private final Object message;
+ private final ChannelPromise promise;
+
+ private Entry(Object message, ChannelPromise promise) {
+ this.message = message;
+ this.promise = promise;
+ }
+
+ public Object getMessage() {
+ return message;
+ }
+
+ public ChannelPromise getPromise() {
+ return promise;
+ }
+ }
+
+ private List<Entry> queue;
+ private final Set<Object> waiting = new HashSet<>();
+
+ @Override
+ public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
+ List<Entry> output = new LinkedList<>();
+ synchronized (this) {
+ if (msg instanceof Event) {
+ if (msg instanceof EventReceived) {
+ LOGGER.debug("Event received");
+ if (queue == null) {
+ queue = new LinkedList<>();
+ }
+ } else if (msg instanceof EventDecoded) {
+ EventDecoded event = (EventDecoded) msg;
+ LOGGER.debug("Event decoded {}", event.getObjects().size());
+ waiting.addAll(event.getObjects());
+ } else if (msg instanceof EventHandled) {
+ EventHandled event = (EventHandled) msg;
+ LOGGER.debug("Event handled");
+ waiting.remove(event.getObject());
+ }
+ if (!(msg instanceof EventReceived) && waiting.isEmpty()) {
+ output.addAll(queue);
+ queue = null;
+ }
+ } else if (queue != null) {
+ LOGGER.debug("Message queued");
+ queue.add(new Entry(msg, promise));
+ } else {
+ LOGGER.debug("Message sent");
+ output.add(new Entry(msg, promise));
+ }
+ }
+ for (Entry entry : output) {
+ ctx.write(entry.getMessage(), entry.getPromise());
+ }
+ }
+
+}