Ref #34124: allow integrating Grafana

Author: LEDfan

src/main/java/eu/openanalytics/containerproxy/util/ProxyMappingManager.java

@@ -76,15 +76,15 @@
 public class ProxyMappingManager {
 
     private static final String PROXY_INTERNAL_ENDPOINT = "/proxy_endpoint";
-    private static final AttachmentKey<ProxyMappingManager> ATTACHMENT_KEY_DISPATCHER = AttachmentKey.create(ProxyMappingManager.class);
+    public static final AttachmentKey<ProxyMappingManager> ATTACHMENT_KEY_DISPATCHER = AttachmentKey.create(ProxyMappingManager.class);
     private static final AttachmentKey<ProxyIdAttachment> ATTACHMENT_KEY_PROXY_ID = AttachmentKey.create(ProxyIdAttachment.class);
     private static final AttachmentKey<OriginalUrlAttachmentKey> ATTACHMENT_ORIGINAL_URL = AttachmentKey.create(OriginalUrlAttachmentKey.class);
 
     private final Logger logger = LoggerFactory.getLogger(getClass());
     private final StructuredLogger slogger = new StructuredLogger(logger);
     // the current set of prefixPaths registered in the pathHandler
     private final Map<String, List<String>> prefixPaths = new HashMap<>();
-    private PathHandler pathHandler;
+    private ProxyPathHandler pathHandler;
     private volatile boolean isShuttingDown = false;
 
     @Inject
@@ -172,6 +172,11 @@ public synchronized void addMappings(Proxy proxy) {
         prefixPaths.put(proxy.getId(), newPrefixPaths);
     }
 
+    public PathHandler getHttpHandler() {
+        if (pathHandler == null) throw new IllegalStateException("Cannot change mappings: web server is not yet running.");
+        return pathHandler;
+    }
+
     @SuppressWarnings("deprecation")
     private synchronized String addMapping(Proxy proxy, String mapping, URI target) {
         String prefixPath = getPrefixPath(proxy.getId(), mapping);