From 7ac175f1da9220bc6565e129c2f3dce8ff03b077 Mon Sep 17 00:00:00 2001
From: Bjørn Christian Seime <bjorncs@yahooinc.com>
Date: Fri, 15 Jul 2022 13:23:32 +0200
Subject: Build vespa-feed-client as multi-release JAR

Hardcode ALPN protcol name for JDK8
---
 vespa-feed-client/pom.xml                          | 31 +++++++++++++++++++---
 .../ai/vespa/feed/client/impl/ApacheCluster.java   |  8 +++---
 .../vespa/feed/client/impl/TlsDetailsFactory.java  | 16 +++++++++++
 .../vespa/feed/client/impl/TlsDetailsFactory.java  | 20 ++++++++++++++
 4 files changed, 66 insertions(+), 9 deletions(-)
 create mode 100644 vespa-feed-client/src/main/java/ai/vespa/feed/client/impl/TlsDetailsFactory.java
 create mode 100644 vespa-feed-client/src/main/java9/ai/vespa/feed/client/impl/TlsDetailsFactory.java

diff --git a/vespa-feed-client/pom.xml b/vespa-feed-client/pom.xml
index 536637bdce2..8b7b82573c4 100644
--- a/vespa-feed-client/pom.xml
+++ b/vespa-feed-client/pom.xml
@@ -53,10 +53,33 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
-        <configuration>
-          <release>${vespaClients.jdk.releaseVersion}</release>
-          <showDeprecation>true</showDeprecation>
-        </configuration>
+        <executions>
+          <execution>
+            <id>compile-java-${vespaClients.jdk.releaseVersion}</id>
+            <goals>
+              <goal>compile</goal>
+            </goals>
+            <configuration>
+              <release>${vespaClients.jdk.releaseVersion}</release>
+              <showDeprecation>true</showDeprecation>
+            </configuration>
+          </execution>
+          <execution>
+            <id>compile-java-9</id>
+            <phase>compile</phase>
+            <goals>
+              <goal>compile</goal>
+            </goals>
+            <configuration>
+              <release>9</release>
+              <compileSourceRoots>
+                <compileSourceRoot>${project.basedir}/src/main/java9</compileSourceRoot>
+              </compileSourceRoots>
+              <outputDirectory>${project.build.outputDirectory}/META-INF/versions/9</outputDirectory>
+              <showDeprecation>true</showDeprecation>
+            </configuration>
+          </execution>
+        </executions>
       </plugin>
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
diff --git a/vespa-feed-client/src/main/java/ai/vespa/feed/client/impl/ApacheCluster.java b/vespa-feed-client/src/main/java/ai/vespa/feed/client/impl/ApacheCluster.java
index 62cd56f21ce..decb5021f8f 100644
--- a/vespa-feed-client/src/main/java/ai/vespa/feed/client/impl/ApacheCluster.java
+++ b/vespa-feed-client/src/main/java/ai/vespa/feed/client/impl/ApacheCluster.java
@@ -15,7 +15,6 @@ import org.apache.hc.core5.http.message.BasicHeader;
 import org.apache.hc.core5.http2.config.H2Config;
 import org.apache.hc.core5.net.URIAuthority;
 import org.apache.hc.core5.reactor.IOReactorConfig;
-import org.apache.hc.core5.reactor.ssl.TlsDetails;
 import org.apache.hc.core5.util.Timeout;
 
 import javax.net.ssl.SSLContext;
@@ -131,10 +130,9 @@ class ApacheCluster implements Cluster {
             throw new IllegalStateException("No adequate SSL cipher suites supported by the JVM");
 
         ClientTlsStrategyBuilder tlsStrategyBuilder = ClientTlsStrategyBuilder.create()
-                                                                              .setTlsDetailsFactory(sslEngine ->
-                                                                                                    new TlsDetails(sslEngine.getSession(), sslEngine.getApplicationProtocol()))
-                                                                              .setCiphers(allowedCiphers)
-                                                                              .setSslContext(sslContext);
+                .setTlsDetailsFactory(TlsDetailsFactory::create)
+                .setCiphers(allowedCiphers)
+                .setSslContext(sslContext);
         if (builder.hostnameVerifier != null)
             tlsStrategyBuilder.setHostnameVerifier(builder.hostnameVerifier);
 
diff --git a/vespa-feed-client/src/main/java/ai/vespa/feed/client/impl/TlsDetailsFactory.java b/vespa-feed-client/src/main/java/ai/vespa/feed/client/impl/TlsDetailsFactory.java
new file mode 100644
index 00000000000..5183ce61761
--- /dev/null
+++ b/vespa-feed-client/src/main/java/ai/vespa/feed/client/impl/TlsDetailsFactory.java
@@ -0,0 +1,16 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package ai.vespa.feed.client.impl;
+
+import org.apache.hc.core5.reactor.ssl.TlsDetails;
+
+import javax.net.ssl.SSLEngine;
+
+/**
+ * @author bjorncs
+ */
+public class TlsDetailsFactory {
+    private TlsDetailsFactory() {}
+
+    public static TlsDetails create(SSLEngine e) { return new TlsDetails(e.getSession(), "h2"); /*h2 == HTTP2*/ }
+}
+
diff --git a/vespa-feed-client/src/main/java9/ai/vespa/feed/client/impl/TlsDetailsFactory.java b/vespa-feed-client/src/main/java9/ai/vespa/feed/client/impl/TlsDetailsFactory.java
new file mode 100644
index 00000000000..f9903d9943d
--- /dev/null
+++ b/vespa-feed-client/src/main/java9/ai/vespa/feed/client/impl/TlsDetailsFactory.java
@@ -0,0 +1,20 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package ai.vespa.feed.client.impl;
+
+import org.apache.hc.core5.reactor.ssl.TlsDetails;
+
+import javax.net.ssl.SSLEngine;
+
+/**
+ * {@link SSLEngine#getApplicationProtocol()} is not available on all JDK8 versions
+ * (https://bugs.openjdk.org/browse/JDK-8051498)
+ *
+ * @author bjorncs
+ */
+public class TlsDetailsFactory {
+    private TlsDetailsFactory() {}
+
+    public static TlsDetails create(SSLEngine e) {
+        return new TlsDetails(e.getSession(), e.getApplicationProtocol());
+    }
+}
-- 
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