Revert "Merge pull request #17603 from vespa-engine/jonmv/revert-apache-config-server-client"

This reverts commit 9458ad2d810ff988ccc19cd8554bdbc78dabe588, reversing
changes made to 6e94e192a07a540bff9b3e13ad05c8d0af093928.

2 files changed, 32 insertions, 27 deletions

diff --git a/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/integration/configserver/ConfigServerException.java b/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/integration/configserver/ConfigServerException.java
index 4240b0d9fa6..5e4d3345b7a 100644
--- a/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/integration/configserver/ConfigServerException.java
+++ b/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/integration/configserver/ConfigServerException.java
@@ -1,38 +1,32 @@
-// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.vespa.hosted.controller.api.integration.configserver;
 
-import java.net.URI;
-import java.util.Objects;
+import com.yahoo.slime.Inspector;
+import com.yahoo.slime.SlimeUtils;
+import org.apache.hc.core5.http.ClassicHttpRequest;
+
+import java.util.stream.Stream;
 
 /**
- * @author Tony Vaagenes
+ * An exception due to server error, a bad request, or similar.
+ *
+ * @author jonmv
  */
 public class ConfigServerException extends RuntimeException {
 
-    private final URI serverUri;
-    private final ErrorCode errorCode;
-    private final String serverMessage;
+    private final ErrorCode code;
+    private final String message;
 
-    public ConfigServerException(URI serverUri, String context, String serverMessage, ErrorCode errorCode, Throwable cause) {
-        super(context + ": " + serverMessage, cause);
-        this.serverUri = Objects.requireNonNull(serverUri);
-        this.errorCode = Objects.requireNonNull(errorCode);
-        this.serverMessage = Objects.requireNonNull(serverMessage);
+    public ConfigServerException(ErrorCode code, String message, String context) {
+        super(context + ": " + message);
+        this.code = code;
+        this.message = message;
     }
 
-    public ErrorCode getErrorCode() {
-        return errorCode;
-    }
+    public ErrorCode code() { return code; }
 
-    public URI getServerUri() {
-        return serverUri;
-    }
+    public String message() { return message; }
 
-    public String getServerMessage() {
-        return serverMessage;
-    }
-
-    // TODO: Copied from Vespa. Expose these in Vespa and use them here
     public enum ErrorCode {
         APPLICATION_LOCK_FAILURE,
         BAD_REQUEST,
@@ -46,7 +40,18 @@ public class ConfigServerException extends RuntimeException {
         UNKNOWN_VESPA_VERSION,
         PARENT_HOST_NOT_READY,
         CERTIFICATE_NOT_READY,
-        LOAD_BALANCER_NOT_READY
+        LOAD_BALANCER_NOT_READY,
+        INCOMPLETE_RESPONSE
+    }
+
+    public static ConfigServerException readException(int statusCode, byte[] body, ClassicHttpRequest request) {
+        Inspector root = SlimeUtils.jsonToSlime(body).get();
+        String codeName = root.field("error-code").asString();
+        ErrorCode code = Stream.of(ErrorCode.values())
+                               .filter(value -> value.name().equals(codeName))
+                               .findAny().orElse(ErrorCode.INCOMPLETE_RESPONSE);
+        String message = root.field("message").valid() ? root.field("message").asString() : "(no message)";
+        return new ConfigServerException(code, message, request + " failed with status " + statusCode);
     }
 
 }
diff --git a/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/integration/configserver/LoadBalancer.java b/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/integration/configserver/LoadBalancer.java
index 05bdf3c3412..d2f19f4df9f 100644
--- a/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/integration/configserver/LoadBalancer.java
+++ b/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/integration/configserver/LoadBalancer.java
@@ -18,11 +18,11 @@ public class LoadBalancer {
     private final String id;
     private final ApplicationId application;
     private final ClusterSpec.Id cluster;
-    private final HostName hostname;
+    private final Optional<HostName> hostname;
     private final State state;
     private final Optional<String> dnsZone;
 
-    public LoadBalancer(String id, ApplicationId application, ClusterSpec.Id cluster, HostName hostname, State state,
+    public LoadBalancer(String id, ApplicationId application, ClusterSpec.Id cluster, Optional<HostName> hostname, State state,
                         Optional<String> dnsZone) {
         this.id = Objects.requireNonNull(id, "id must be non-null");
         this.application = Objects.requireNonNull(application, "application must be non-null");
@@ -44,7 +44,7 @@ public class LoadBalancer {
         return cluster;
     }
 
-    public HostName hostname() {
+    public Optional<HostName> hostname() {
         return hostname;
     }