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https://issues.apache.org/jira/browse/DRILL-7437?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17056372#comment-17056372
]
ASF GitHub Bot commented on DRILL-7437:
---------------------------------------
paul-rogers commented on pull request #1892: DRILL-7437: Storage Plugin for
Generic HTTP REST API
URL: https://github.com/apache/drill/pull/1892#discussion_r390568363
##########
File path:
contrib/storage-http/src/main/java/org/apache/drill/exec/store/http/HttpSchemaFactory.java
##########
@@ -0,0 +1,105 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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 org.apache.drill.exec.store.http;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.calcite.schema.SchemaPlus;
+import org.apache.drill.common.exceptions.DrillRuntimeException;
+import org.apache.drill.common.exceptions.UserException;
+import org.apache.drill.exec.store.AbstractSchema;
+import org.apache.drill.exec.store.AbstractSchemaFactory;
+import org.apache.drill.exec.store.SchemaConfig;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class HttpSchemaFactory extends AbstractSchemaFactory {
+ private static final Logger logger =
LoggerFactory.getLogger(HttpSchemaFactory.class);
+
+ private final HttpStoragePlugin plugin;
+
+ public HttpSchemaFactory(HttpStoragePlugin plugin, String schemaName) {
+ super(schemaName);
+ this.plugin = plugin;
+ }
+
+ @Override
+ public void registerSchemas(SchemaConfig schemaConfig, SchemaPlus parent) {
+ HttpSchema schema = new HttpSchema(getName());
+ logger.debug("Registering {} {}", schema.getName(), schema.toString());
+
+ SchemaPlus schemaPlus = parent.add(getName(), schema);
+ schema.setHolder(schemaPlus);
+ }
+
+ class HttpSchema extends AbstractSchema {
+
+ public HttpSchema(String name) {
+ super(Collections.emptyList(), name);
+ }
+
+ void setHolder(SchemaPlus plusOfThis) {
+ for (String s : getSubSchemaNames()) {
+ plusOfThis.add(s, getSubSchemaKnownExists(s));
+ }
+ }
+
+ @Override
+ public Set<String> getSubSchemaNames() {
+ HttpStoragePluginConfig config = plugin.getConfig();
+ Map<String, HttpAPIConfig> connections = config.connections();
+ Set<String> subSchemaNames = new HashSet<>();
+
+ // Get the possible subschemas.
+ for (Map.Entry<String, HttpAPIConfig> entry : connections.entrySet()) {
+ subSchemaNames.add(entry.getKey());
+ }
+ return subSchemaNames;
+ }
+
+ @Override
+ public AbstractSchema getSubSchema(String name) {
+ try {
+ if (!plugin.getConfig().connections().containsKey(name)) {
+ throw UserException
+ .connectionError()
+ .message("API '{}' does not exist in HTTP Storage plugin '{}'",
name, getName())
+ .build(logger);
+ }
+ return getSubSchemaKnownExists(name);
+ } catch (Exception e) {
+ throw new DrillRuntimeException(e);
Review comment:
Was this a copy/paste? If we go to the trouble of throwing a
`UserException`, we should throw it, not catch it and wrap it in another kind
of exception (which will, later be wrapped in a `UserException`.) Just let the
`UserException` be thrown.
Also, nit, reverse polarity: `if (...containsKey...) { return get... } else
{ throw ... }`
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> Storage Plugin for Generic HTTP REST API
> ----------------------------------------
>
> Key: DRILL-7437
> URL: https://issues.apache.org/jira/browse/DRILL-7437
> Project: Apache Drill
> Issue Type: New Feature
> Reporter: Charles Givre
> Assignee: Charles Givre
> Priority: Minor
> Fix For: Future
>
>
> In many data analytic situations there is a need to obtain reference data
> which is volatile or hosted on a service with a REST API.
> For instance, consider the case of a financial dataset which you want to run
> a currency conversion. Or in the security arena, an organization might have
> a service that returns network information about an IT asset. The goal being
> to enable Drill to quickly incorporate external data that is only accessible
> via REST API.
> This plugin is not intended to be a substitute for dedicated storage plugins
> with systems that use a REST API, such as Apache Solr or ElasticSearch.
> This plugin is based on several projects that were posted on github but never
> completed or submitted to Drill. Posted here for attribution:
> * [https://github.com/kevinlynx/drill-storage-http]
> * [https://github.com/mayunSaicmotor/drill-storage-http]
>
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