feat(server): autodiscovery circuit breaker call (#8022)

* Added circuit breaker instead of plain REST call to meta connection properties
* Refactored common-model to add dynamic metadata modeling
* Refactored MetadataCommand to be used as abstract base for MetadataCommandAction and MetadataConnectionPropertiesCommand
* Refactored unit test to use DynamicConnectionPropertiesMetadata instead of raw Response
* Removed useless pom dependencies

Closes ENTESB-12498

app/common/model/src/main/java/io/syndesis/common/model/connection/ConfigurationProperty.java

@@ -21,7 +21,7 @@
 
 import io.syndesis.common.model.Ordered;
 import io.syndesis.common.model.WithTags;
-import io.syndesis.common.model.connection.DynamicActionMetadata.ActionPropertySuggestion;
+import io.syndesis.common.model.connection.WithDynamicProperties.ActionPropertySuggestion;
 
 import org.immutables.value.Value;
 

app/common/model/src/main/java/io/syndesis/common/model/connection/DynamicActionMetadata.java

@@ -24,29 +24,15 @@
 
 @Value.Immutable
 @JsonDeserialize(builder = DynamicActionMetadata.Builder.class)
-public interface DynamicActionMetadata {
+public interface DynamicActionMetadata extends WithDynamicProperties {
 
     DynamicActionMetadata NOTHING = new DynamicActionMetadata.Builder().build();
 
-    @Value.Immutable
-    @JsonDeserialize(builder = ActionPropertySuggestion.Builder.class)
-    interface ActionPropertySuggestion {
-
-        final class Builder extends ImmutableActionPropertySuggestion.Builder {
-            public static ActionPropertySuggestion of(final String value, final String displayValue) {
-                return new ActionPropertySuggestion.Builder().value(value).displayValue(displayValue).build();
-            }
-        }
-
-        String displayValue();
-
-        String value();
-    }
-
     final class Builder extends ImmutableDynamicActionMetadata.Builder {
         // make ImmutableDynamicActionMetadata.Builder accessible
     }
 
+    @Override
     Map<String, List<ActionPropertySuggestion>> properties();
 
     DataShape inputShape();

app/common/model/src/main/java/io/syndesis/common/model/connection/DynamicConnectionPropertiesMetadata.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2016 Red Hat, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.syndesis.common.model.connection;
+
+import java.util.List;
+import java.util.Map;
+
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import org.immutables.value.Value;
+
+@Value.Immutable
+@JsonDeserialize(builder = DynamicConnectionPropertiesMetadata.Builder.class)
+public interface DynamicConnectionPropertiesMetadata extends WithDynamicProperties {
+
+    DynamicConnectionPropertiesMetadata NOTHING = new DynamicConnectionPropertiesMetadata.Builder().build();
+
+    final class Builder extends ImmutableDynamicConnectionPropertiesMetadata.Builder {
+        // make ImmutableDynamicConnectionPropertiesMetadata.Builder accessible
+    }
+
+    @Override
+    Map<String, List<ActionPropertySuggestion>> properties();
+}

app/common/model/src/main/java/io/syndesis/common/model/connection/WithDynamicProperties.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2016 Red Hat, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.syndesis.common.model.connection;
+
+import java.util.List;
+import java.util.Map;
+
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import org.immutables.value.Value;
+
+public interface WithDynamicProperties {
+
+    @Value.Immutable
+    @JsonDeserialize(builder = ActionPropertySuggestion.Builder.class)
+    interface ActionPropertySuggestion {
+
+        final class Builder extends ImmutableActionPropertySuggestion.Builder {
+            public static ActionPropertySuggestion of(final String value, final String displayValue) {
+                return new ActionPropertySuggestion.Builder().value(value).displayValue(displayValue).build();
+            }
+        }
+
+        String displayValue();
+
+        String value();
+    }
+
+    Map<String, List<ActionPropertySuggestion>> properties();
+}

app/server/endpoint/pom.xml

@@ -198,11 +198,6 @@
       <artifactId>jackson-module-jsonSchema</artifactId>
     </dependency>
 
-    <dependency>
-      <groupId>com.fasterxml.jackson.jaxrs</groupId>
-      <artifactId>jackson-jaxrs-json-provider</artifactId>
-    </dependency>
-
     <dependency>
       <groupId>org.jboss.spec.javax.ws.rs</groupId>
       <artifactId>jboss-jaxrs-api_2.1_spec</artifactId>
@@ -278,11 +273,6 @@
       <artifactId>hystrix-core</artifactId>
     </dependency>
 
-    <dependency>
-      <groupId>org.jboss.resteasy</groupId>
-      <artifactId>resteasy-client</artifactId>
-    </dependency>
-
     <dependency>
       <groupId>org.hibernate.validator</groupId>
       <artifactId>hibernate-validator</artifactId>

app/server/endpoint/src/main/java/io/syndesis/server/endpoint/v1/handler/connection/ConnectionActionHandler.java

@@ -142,7 +142,7 @@ public Response enrichWithMetadata(
         // lastly put all connection properties
         parameters.putAll(encryptionComponent.decrypt(connection.getConfiguredProperties()));
 
-        final HystrixExecutable<DynamicActionMetadata> meta = createMetadataCommand(action, parameters);
+        final HystrixExecutable<DynamicActionMetadata> meta = createMetadataCommandAction(action, parameters);
         final DynamicActionMetadata dynamicActionMetadata = meta.execute();
 
         final ConnectorDescriptor enrichedDescriptor = applyMetadataTo(generatedDescriptor, dynamicActionMetadata);
@@ -157,9 +157,9 @@ public Response enrichWithMetadata(
         return Response.status(status).entity(metaResult).build();
     }
 
-    protected HystrixExecutable<DynamicActionMetadata> createMetadataCommand(final ConnectorAction action,
-        final Map<String, String> parameters) {
-        return new MetadataCommand(config, connectorId, action, parameters);
+    protected HystrixExecutable<DynamicActionMetadata> createMetadataCommandAction(final ConnectorAction action,
+                                                                                   final Map<String, String> parameters) {
+        return new MetadataCommandAction(config, connectorId, action, parameters);
     }
 
     private static DataShape adaptDataShape(final Optional<DataShape> maybeDataShape) {

app/server/endpoint/src/main/java/io/syndesis/server/endpoint/v1/handler/connection/ConnectorHandler.java

@@ -25,8 +25,6 @@
 import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 import javax.ws.rs.core.MediaType;
-import javax.ws.rs.core.Response;
-import javax.ws.rs.core.Response.Status.Family;
 import javax.ws.rs.core.UriInfo;
 import java.io.BufferedInputStream;
 import java.io.IOException;
@@ -35,14 +33,12 @@
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
-import java.util.Iterator;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Optional;
 import java.util.stream.Collectors;
 
-import com.fasterxml.jackson.databind.JsonNode;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import io.swagger.v3.oas.annotations.Parameter;
 import io.syndesis.common.model.Kind;
@@ -52,6 +48,8 @@
 import io.syndesis.common.model.connection.ConfigurationProperty;
 import io.syndesis.common.model.connection.Connection;
 import io.syndesis.common.model.connection.Connector;
+import io.syndesis.common.model.connection.DynamicConnectionPropertiesMetadata;
+import io.syndesis.common.model.connection.WithDynamicProperties;
 import io.syndesis.common.model.filter.FilterOptions;
 import io.syndesis.common.model.filter.Op;
 import io.syndesis.common.model.icon.Icon;
@@ -129,7 +127,7 @@ public Connector get(final String id) {
 
         // Retrieve dynamic properties, if connector is dynamic
         if (connector.getTags().contains("dynamic")) {
-            connector = enrichWithDynamicProperties(connector);
+            connector = enrichConnectorWithDynamicProperties(connector);
         }
 
         final Optional<String> connectorGroupId = connector.getConnectorGroupId();
@@ -149,48 +147,42 @@ public Connector get(final String id) {
      * @param connector
      * @return an enriched {@link Connector}
      */
-    Connector enrichWithDynamicProperties(Connector connector) {
+    Connector enrichConnectorWithDynamicProperties(Connector connector) {
         final String connectorId = connector.getId().get();
         final ConnectorPropertiesHandler propertiesHandler = properties(connectorId);
-
-        final JsonNode jsonResponse;
-        try (Response response = propertiesHandler.enrichWithDynamicProperties(connectorId, null)) {
-            if (response.getStatusInfo().getFamily() != Family.SUCCESSFUL) {
-                return connector;
-            }
-
-            jsonResponse = response.readEntity(JsonNode.class);
+        final Map<String, ConfigurationProperty> dynamicProperties = enrichConfigurationPropertiesWithDynamicProperties(
+            connector.getProperties(),
+            propertiesHandler.dynamicConnectionProperties(connectorId)
+        );
+        if (!dynamicProperties.isEmpty()) {
+            return connector.builder().properties(dynamicProperties).build();
         }
+        return connector;
+    }
 
-        final Iterator<Map.Entry<String, JsonNode>> iterator = jsonResponse.path("properties").fields();
-        final Map<String, ConfigurationProperty> dynamicProperties = new HashMap<>();
-
-        while (iterator.hasNext()) {
-            Map.Entry<String, JsonNode> next = iterator.next();
-            String propertyName = next.getKey();
-            JsonNode property = next.getValue();
+    private static Map<String, ConfigurationProperty> enrichConfigurationPropertiesWithDynamicProperties(Map<String, ConfigurationProperty> inputProperties,
+                                                                                                         DynamicConnectionPropertiesMetadata dynamicConnectionProperties) {
+        Map<String, ConfigurationProperty> dynamicProperties = new HashMap<>();
+        for(Map.Entry<String, List<WithDynamicProperties.ActionPropertySuggestion>> entry: dynamicConnectionProperties.properties().entrySet()){
+            String propertyName = entry.getKey();
+            List<WithDynamicProperties.ActionPropertySuggestion> list = entry.getValue();
             List<ConfigurationProperty.PropertyValue> values = new ArrayList<>();
-            if (property.isArray()) {
-                for (final JsonNode value : property) {
-                    ConfigurationProperty.PropertyValue val = new ConfigurationProperty.PropertyValue.Builder()
-                        .label(value.get("displayValue").asText())
-                        .value(value.get("value").asText())
-                        .build();
-                    values.add(val);
-                }
+
+            for (WithDynamicProperties.ActionPropertySuggestion suggestion : list) {
+                ConfigurationProperty.PropertyValue val = ConfigurationProperty.PropertyValue.Builder.from(suggestion);
+                values.add(val);
             }
+
             if (!values.isEmpty()) {
                 ConfigurationProperty configurationProperty = new ConfigurationProperty.Builder()
-                    .createFrom(connector.getProperties().get(propertyName))
+                    .createFrom(inputProperties.get(propertyName))
                     .addEnum(values.toArray(new ConfigurationProperty.PropertyValue[0]))
                     .build();
                 dynamicProperties.put(propertyName, configurationProperty);
             }
         }
-        if (!dynamicProperties.isEmpty()) {
-            return connector.builder().properties(dynamicProperties).build();
-        }
-        return connector;
+
+        return dynamicProperties;
     }
 
     @Path("/{connectorId}/actions")

app/server/endpoint/src/main/java/io/syndesis/server/endpoint/v1/handler/connection/ConnectorPropertiesHandler.java

@@ -15,42 +15,34 @@
  */
 package io.syndesis.server.endpoint.v1.handler.connection;
 
-import java.util.Map;
-
 import javax.ws.rs.POST;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
-import javax.ws.rs.client.Client;
-import javax.ws.rs.client.Entity;
-import javax.ws.rs.client.WebTarget;
 import javax.ws.rs.core.MediaType;
-import javax.ws.rs.core.Response;
+import java.util.Collections;
 
+import com.netflix.hystrix.HystrixExecutable;
+import io.syndesis.common.model.connection.DynamicConnectionPropertiesMetadata;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import io.syndesis.server.verifier.MetadataConfigurationProperties;
 
-import org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder;
-
 @Tag(name = "properties")
 public class ConnectorPropertiesHandler {
-    private final String metaPropertiesUrl;
+    private final MetadataConfigurationProperties config;
 
     public ConnectorPropertiesHandler(final MetadataConfigurationProperties config) {
-        metaPropertiesUrl = String.format("http://%s/api/v1/connectors/%%s/properties/meta", config.getService());
+        this.config = config;
     }
 
     @POST
     @Produces(MediaType.APPLICATION_JSON)
-    public Response enrichWithDynamicProperties(@PathParam("id") final String connectorId, final Map<String, Object> props) {
-        // TODO replace properly with circuit breaker
-        String metadataUrl = String.format(metaPropertiesUrl, connectorId);
-        Client client = createClient();
-        WebTarget target = client.target(metadataUrl);
-
-        return target.request().post(Entity.entity(props, MediaType.APPLICATION_JSON_TYPE));
+    public DynamicConnectionPropertiesMetadata dynamicConnectionProperties(@PathParam("id") final String connectorId) {
+        final HystrixExecutable<DynamicConnectionPropertiesMetadata> meta = createMetadataConnectionPropertiesCommand(connectorId);
+        return meta.execute();
     }
 
-    Client createClient() {
-        return new ResteasyClientBuilder().build();
+    protected HystrixExecutable<DynamicConnectionPropertiesMetadata> createMetadataConnectionPropertiesCommand(final String connectorId) {
+        return new MetadataConnectionPropertiesCommand(config, connectorId, Collections.emptyMap());
     }
+
 }