Bring back optional dependencies (#1723)

* Make some dependencies optional again

Make dependencies back optional. They were made required when Spring Boot 2.7 support was added. Most of those dependencies are related to specific sender implementation and the user is supposed to choose one and provide needed client library.

* Remove unused alpn-api optional dependency

build.gradle

@@ -59,7 +59,6 @@ allprojects {
             wiremock          : '3.0.1',
             spock             : '2.4-M1-groovy-4.0',
             groovy            : '4.0.12',
-            alpn_api          : '1.1.2.v20150522',
             avro              : '1.9.1',
             json2avro         : '0.2.14',
             okhttp            : '3.9.1',

hermes-client/build.gradle

@@ -3,15 +3,13 @@ plugins {
 }
 
 dependencies {
-    api group: 'io.dropwizard.metrics', name: 'metrics-core', version: versions.dropwizard_metrics
-    api group: 'io.micrometer', name: 'micrometer-core', version: versions.micrometer_metrics
-    api group: 'org.glassfish.jersey.core', name: 'jersey-client', version: versions.jersey
+    compileOnly group: 'io.dropwizard.metrics', name: 'metrics-core', version: versions.dropwizard_metrics
+    compileOnly group: 'io.micrometer', name: 'micrometer-core', version: versions.micrometer_metrics
+    compileOnly group: 'org.glassfish.jersey.core', name: 'jersey-client', version: versions.jersey
     compileOnly group: 'org.glassfish.jersey.inject', name: 'jersey-hk2', version: versions.jersey
-    api group: 'org.springframework', name: 'spring-web', version: versions.spring_web
-    api group: 'org.springframework', name: 'spring-webflux', version: versions.spring_web
-
-    api group: 'com.squareup.okhttp3', name: 'okhttp', version: versions.okhttp
-    compileOnly group: 'org.eclipse.jetty.alpn', name: 'alpn-api', version: versions.alpn_api
+    compileOnly group: 'org.springframework', name: 'spring-web', version: versions.spring_web
+    compileOnly group: 'org.springframework', name: 'spring-webflux', version: versions.spring_web
+    compileOnly group: 'com.squareup.okhttp3', name: 'okhttp', version: versions.okhttp
 
     implementation group: 'net.jodah', name: 'failsafe', version: versions.failsafe
     api group: 'io.projectreactor', name: 'reactor-core', version: '3.4.25'
@@ -29,7 +27,6 @@ dependencies {
     testImplementation group: 'org.springframework', name: 'spring-web', version: versions.spring_web
     testImplementation group: 'org.springframework', name: 'spring-webflux', version: versions.spring_web
     testImplementation group: 'com.squareup.okhttp3', name: 'okhttp', version: versions.okhttp
-    testImplementation group: 'org.eclipse.jetty.alpn', name: 'alpn-api', version: versions.alpn_api
     testImplementation group: 'io.projectreactor.netty', name: 'reactor-netty', version: '1.0.25'
     testImplementation group: 'io.projectreactor', name: 'reactor-test', version: '3.4.25'
 

hermes-frontend/build.gradle

@@ -20,10 +20,6 @@ dependencies {
     implementation group: 'commons-io', name: 'commons-io', version: '2.4'
     implementation group: 'net.jodah', name: 'failsafe', version: versions.failsafe
 
-    compileOnly group: 'org.eclipse.jetty.alpn', name: 'alpn-api', version: versions.alpn_api
-
-    testImplementation group: 'org.eclipse.jetty.alpn', name: 'alpn-api', version: versions.alpn_api
-
     testImplementation group: 'org.spockframework', name: 'spock-core', version: versions.spock
     testImplementation group: 'org.apache.groovy', name: 'groovy-json', version: versions.groovy
 

integration/build.gradle

@@ -10,7 +10,6 @@ project.configurations {
         transitive = true
         visible = true
     }
-    alpnboot
 }
 
 dependencies {
@@ -41,8 +40,6 @@ dependencies {
     integration(group: 'org.hornetq', name: 'hornetq-jms-server', version: '2.4.1.Final') {
         exclude module: 'hornetq-native'
     }
-
-    integration group: 'org.eclipse.jetty.alpn', name: 'alpn-api', version: versions.alpn_api
 }
 
 project.sourceSets {