SSE API and implementation in Nima

bom/pom.xml

@@ -1303,6 +1303,21 @@
                 <artifactId>helidon-nima-websocket-client</artifactId>
                 <version>${helidon.version}</version>
             </dependency>
+            <dependency>
+                <groupId>io.helidon.nima.sse</groupId>
+                <artifactId>helidon-nima-sse</artifactId>
+                <version>${helidon.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.helidon.nima.sse</groupId>
+                <artifactId>helidon-nima-sse-webclient</artifactId>
+                <version>${helidon.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.helidon.nima.sse</groupId>
+                <artifactId>helidon-nima-sse-webserver</artifactId>
+                <version>${helidon.version}</version>
+            </dependency>
             <dependency>
                 <groupId>io.helidon.nima.testing.junit5</groupId>
                 <artifactId>helidon-nima-testing-junit5-webserver</artifactId>

common/http/src/main/java/io/helidon/common/http/Http.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2022 Oracle and/or its affiliates.
+ * Copyright (c) 2018, 2023 Oracle and/or its affiliates.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -1596,6 +1596,12 @@ public static final class HeaderValues {
          */
         public static final HeaderValue CONTENT_TYPE_OCTET_STREAM = Header.createCached(Header.CONTENT_TYPE,
                                                                                         "application/octet-stream");
+        /**
+         * Content type SSE event stream.
+         */
+        public static final HeaderValue CONTENT_TYPE_EVENT_STREAM = Header.createCached(Header.CONTENT_TYPE,
+                                                                                  "text/event-stream");
+
         /**
          * Accept application/json.
          */
@@ -1604,6 +1610,10 @@ public static final class HeaderValues {
          * Accept text/plain with UTF-8.
          */
         public static final HeaderValue ACCEPT_TEXT = Header.createCached(Header.ACCEPT, "text/plain;charset=UTF-8");
+        /**
+         * Accept text/event-stream.
+         */
+        public static final HeaderValue ACCEPT_EVENT_STREAM = Header.createCached(Header.ACCEPT, "text/event-stream");
         /**
          * Expect 100 header.
          */

nima/pom.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright (c) 2022 Oracle and/or its affiliates.
+    Copyright (c) 2022, 2023 Oracle and/or its affiliates.
 
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
@@ -42,6 +42,7 @@
         <module>webclient</module>
         <module>webserver</module>
         <module>http2</module>
+        <module>sse</module>
         <module>websocket</module>
         <module>grpc</module>
         <module>observe</module>

nima/sse/README.md

@@ -0,0 +1,5 @@
+SSE
+---
+
+Server sent events implementation in Nima.
+

nima/sse/pom.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    Copyright (c) 2023 Oracle and/or its affiliates.
+
+    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.
+
+-->
+
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xmlns="http://maven.apache.org/POM/4.0.0"
+        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>io.helidon.nima</groupId>
+        <artifactId>helidon-nima-project</artifactId>
+        <version>4.0.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <groupId>io.helidon.nima.sse</groupId>
+    <artifactId>helidon-nima-sse-project</artifactId>
+    <name>Helidon Níma SSE Project</name>
+
+    <packaging>pom</packaging>
+
+    <modules>
+        <module>sse</module>
+        <module>webclient</module>
+        <module>webserver</module>
+    </modules>
+
+</project>

nima/sse/sse/pom.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+    Copyright (c) 2023 Oracle and/or its affiliates.
+
+    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.
+  -->
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>io.helidon.nima.sse</groupId>
+        <artifactId>helidon-nima-sse-project</artifactId>
+        <version>4.0.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>helidon-nima-sse</artifactId>
+    <name>Helidon Níma SSE</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>io.helidon.common</groupId>
+            <artifactId>helidon-common</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.helidon.common</groupId>
+            <artifactId>helidon-common-media-type</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.helidon.nima.http.media</groupId>
+            <artifactId>helidon-nima-http-media</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.hamcrest</groupId>
+            <artifactId>hamcrest-all</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>