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/**
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) [2018-2021] Payara Foundation and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://github.com/payara/Payara/blob/master/LICENSE.txt
* See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* The Payara Foundation designates this particular file as subject to the "Classpath"
* exception as provided by the Payara Foundation in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package fish.payara.monitoring.rest.app.resource;
import java.io.StringReader;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import jakarta.enterprise.context.RequestScoped;
import jakarta.inject.Inject;
import jakarta.json.Json;
import jakarta.json.JsonArrayBuilder;
import jakarta.json.JsonObject;
import jakarta.json.JsonReader;
import jakarta.json.JsonString;
import jakarta.json.JsonStructure;
import jakarta.json.JsonValue;
import jakarta.ws.rs.POST;
import jakarta.ws.rs.Path;
import jakarta.ws.rs.Produces;
import jakarta.ws.rs.core.MediaType;
import fish.payara.monitoring.rest.app.MBeanServerDelegate;
import fish.payara.monitoring.rest.app.handler.MBeanAttributeReadHandler;
import fish.payara.monitoring.rest.app.handler.MBeanAttributesReadHandler;
import fish.payara.monitoring.rest.app.handler.MBeanReadHandler;
import fish.payara.monitoring.rest.app.handler.ReadHandler;
/**
* @author Krassimir Valev
*/
@Path("")
@RequestScoped
public class MBeanBulkReadResource {
@Inject
private MBeanServerDelegate mDelegate;
/**
* Returns the {@link String} form of the {@link JSONObject} resource from the ResourceHandler.
*
* @param content
* The JSON request payload, describing the beans and attributes to read.
* @return The {@link String} representation of the MBeanRead/MBeanAttributeRead {@link JSONObject}.
*/
@POST
@Produces(MediaType.APPLICATION_JSON)
public String getReadResource(final String content) {
try (JsonReader reader = Json.createReader(new StringReader(content))) {
// the payload can be either a single request or a bulk one (array)
JsonStructure struct = reader.read();
switch (struct.getValueType()) {
case ARRAY:
List objects = struct.asJsonArray().stream()
.map(value -> handleRequest(value.asJsonObject()))
.filter(Optional::isPresent)
.map(Optional::get)
.collect(Collectors.toList());
JsonArrayBuilder builder = Json.createArrayBuilder();
for (JsonObject jsonObject : objects) {
builder.add(jsonObject);
}
return builder.build().toString();
case OBJECT:
return handleRequest(struct.asJsonObject()).orElse(JsonValue.EMPTY_JSON_OBJECT).toString();
default:
return "invalid JSON structure";
}
}
}
private Optional handleRequest(final JsonObject jsonObject) {
// ignore non-read requests
String type = jsonObject.getString("type", "");
if (!"read".equalsIgnoreCase(type)) {
return Optional.empty();
}
String mbean = jsonObject.getString("mbean", "");
JsonValue attributes = jsonObject.getOrDefault("attribute", JsonValue.NULL);
ReadHandler handler = getReadHandler(mbean, attributes);
return Optional.of(handler.getResource());
}
private ReadHandler getReadHandler(final String mbean, final JsonValue attributes) {
// attributes can be null, a string or a list of strings
switch (attributes.getValueType()) {
case ARRAY:
String[] attributeNames = attributes.asJsonArray().stream()
.map(v -> ((JsonString) v).getString())
.toArray(String[]::new);
return new MBeanAttributesReadHandler(mDelegate, mbean, attributeNames);
case STRING:
String attribute = ((JsonString) attributes).getString();
return new MBeanAttributeReadHandler(mDelegate, mbean, attribute);
default:
return new MBeanReadHandler(mDelegate, mbean);
}
}
}