Added OSGi support for multiple configurable GraphQL servlets

Author: Ben Fortuna

graphql-java-servlet/build.gradle

@@ -24,7 +24,9 @@ dependencies {
     compileOnly 'org.osgi:org.osgi.core:6.0.0'
     compileOnly 'org.osgi:org.osgi.service.cm:1.5.0'
     compileOnly 'org.osgi:org.osgi.service.component:1.3.0'
-    compileOnly 'biz.aQute.bnd:biz.aQute.bndlib:4.3.1'
+    compileOnly 'org.osgi:org.osgi.service.component.annotations:1.3.0'
+    compileOnly 'org.osgi:org.osgi.service.metatype.annotations:1.3.0'
+    compileOnly 'org.osgi:org.osgi.annotation:6.0.0'
 
     testCompile 'io.github.graphql-java:graphql-java-annotations:5.2'
 

graphql-java-servlet/src/main/java/graphql/kickstart/servlet/OsgiGraphQLHttpServlet.java

@@ -3,13 +3,13 @@
 import static graphql.schema.GraphQLObjectType.newObject;
 import static graphql.schema.GraphQLSchema.newSchema;
 
-import aQute.bnd.component.annotations.Activate;
-import aQute.bnd.component.annotations.Component;
-import aQute.bnd.component.annotations.Deactivate;
-import aQute.bnd.component.annotations.Reference;
-import aQute.bnd.component.annotations.ReferenceCardinality;
-import aQute.bnd.component.annotations.ReferencePolicy;
-import aQute.bnd.component.annotations.ReferencePolicyOption;
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
+import org.osgi.service.component.annotations.ReferencePolicy;
+import org.osgi.service.component.annotations.ReferencePolicyOption;
 import graphql.execution.preparsed.NoOpPreparsedDocumentProvider;
 import graphql.execution.preparsed.PreparsedDocumentProvider;
 import graphql.kickstart.servlet.config.DefaultGraphQLSchemaServletProvider;
@@ -38,6 +38,8 @@
 import graphql.kickstart.servlet.core.GraphQLServletListener;
 import graphql.kickstart.servlet.input.GraphQLInvocationInputFactory;
 import graphql.kickstart.execution.instrumentation.NoOpInstrumentationProvider;
+import org.osgi.service.metatype.annotations.Designate;
+
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
@@ -49,8 +51,9 @@
 
 @Component(
     service = {javax.servlet.http.HttpServlet.class, javax.servlet.Servlet.class},
-    property = {"alias=/graphql", "jmx.objectname=graphql.servlet:type=graphql"}
+    property = {"service.description=GraphQL HTTP Servlet"}
 )
+@Designate(ocd = OsgiGraphQLHttpServletConfiguration.class, factory = true)
 public class OsgiGraphQLHttpServlet extends AbstractGraphQLHttpServlet {
 
   private final List<GraphQLQueryProvider> queryProviders = new ArrayList<>();

graphql-java-servlet/src/main/java/graphql/kickstart/servlet/OsgiGraphQLHttpServletConfiguration.java

@@ -0,0 +1,14 @@
+package graphql.kickstart.servlet;
+
+import org.osgi.service.metatype.annotations.AttributeDefinition;
+import org.osgi.service.metatype.annotations.ObjectClassDefinition;
+
+@ObjectClassDefinition(name = "GraphQL HTTP Servlet", description = "GraphQL HTTP Servlet Configuration")
+@interface OsgiGraphQLHttpServletConfiguration {
+
+    @AttributeDefinition(name = "alias", description = "Servlet alias")
+    String alias() default "/graphql";
+
+    @AttributeDefinition(name = "jmx.objectname", description = "JMX object name")
+    String jmx_objectname() default "graphql.servlet:type=graphql";
+}