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Micro Distribution of the Payara Project
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) [2018] 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.microprofile.metrics.writer;
import fish.payara.microprofile.metrics.MetricsService;
import fish.payara.microprofile.metrics.exception.NoSuchMetricException;
import fish.payara.microprofile.metrics.exception.NoSuchRegistryException;
import java.io.IOException;
import java.io.Writer;
import java.util.Map;
import java.util.logging.Logger;
import static java.util.stream.Collectors.joining;
import javax.json.Json;
import javax.json.JsonObject;
import javax.json.JsonObjectBuilder;
import javax.json.JsonWriterFactory;
import static org.eclipse.microprofile.metrics.MetricRegistry.Type.APPLICATION;
import static org.eclipse.microprofile.metrics.MetricRegistry.Type.BASE;
import static org.eclipse.microprofile.metrics.MetricRegistry.Type.VENDOR;
import org.glassfish.internal.api.Globals;
public abstract class JsonWriter implements MetricsWriter {
private final Writer writer;
protected final MetricsService service;
protected static final Logger LOGGER = Logger.getLogger(JsonWriter.class.getName());
public JsonWriter(Writer writer) {
this.writer = writer;
this.service = Globals.getDefaultBaseServiceLocator().getService(MetricsService.class);
}
protected abstract JsonObjectBuilder getJsonData(String registryName) throws NoSuchRegistryException;
protected abstract JsonObjectBuilder getJsonData(String registryName, String metricName) throws NoSuchRegistryException, NoSuchMetricException;
@Override
public void write(String registryName, String metricName) throws NoSuchRegistryException, NoSuchMetricException, IOException {
if (APPLICATION.getName().equals(registryName)) {
JsonObjectBuilder payloadBuilder = Json.createObjectBuilder();
for (String appRegistryName : service.getApplicationRegistryNames()) {
try {
getJsonData(appRegistryName, metricName).build()
.entrySet()
.forEach(entry -> payloadBuilder.add(entry.getKey(), entry.getValue()));
} catch (NoSuchMetricException e) {
//ignore
}
}
JsonObject payload = payloadBuilder.build();
if(payload.isEmpty()){
throw new NoSuchMetricException(metricName);
} else {
serialize(payload);
}
} else {
serialize(getJsonData(registryName, metricName).build());
}
}
@Override
public void write(String registryName) throws NoSuchRegistryException, IOException {
if (APPLICATION.getName().equals(registryName)) {
JsonObjectBuilder payloadBuilder = Json.createObjectBuilder();
for (String appRegistryName : service.getApplicationRegistryNames()) {
getJsonData(appRegistryName).build()
.entrySet()
.forEach(entry -> payloadBuilder.add(entry.getKey(), entry.getValue()));
}
serialize(payloadBuilder.build());
} else {
serialize(getJsonData(registryName).build());
}
}
@Override
public void write() throws IOException {
JsonObjectBuilder payloadBuilder = Json.createObjectBuilder();
JsonObjectBuilder applicationBuilder = Json.createObjectBuilder();
for (String registryName : service.getAllRegistryNames()) {
try {
JsonObjectBuilder value = getJsonData(registryName);
if (!BASE.getName().equals(registryName)
&& !VENDOR.getName().equals(registryName)) {
value.build()
.entrySet()
.forEach(entry -> applicationBuilder.add(entry.getKey(), entry.getValue()));
} else {
payloadBuilder.add(registryName, value.build());
}
} catch (NoSuchRegistryException e) { // Ignore
}
}
JsonObject applicationObject = applicationBuilder.build();
if (!applicationObject.isEmpty()) {
payloadBuilder.add(APPLICATION.getName(), applicationObject);
}
serialize(payloadBuilder.build());
}
protected void serialize(JsonObject payload) throws IOException {
JsonWriterFactory jsonWriterFactory = Json.createWriterFactory(null);
jsonWriterFactory.createWriter(writer).writeObject(payload);
}
protected JsonObject getJsonFromMap(Map map) {
JsonObjectBuilder payloadBuilder = Json.createObjectBuilder();
for (Map.Entry entry : map.entrySet()) {
addValueToJsonObject(payloadBuilder, entry.getKey(), entry.getValue());
}
return payloadBuilder.build();
}
protected void addValueToJsonObject(JsonObjectBuilder payloadBuilder, String key, Number value){
if (value instanceof Integer) {
payloadBuilder.add(key, value.intValue());
} else if (value instanceof Long) {
payloadBuilder.add(key, value.longValue());
} else if (value instanceof Double) {
payloadBuilder.add(key, value.doubleValue());
} else {
payloadBuilder.add(key, value.toString());
}
}
protected String getPairFromMap(Map map) {
if (map == null) {
return null;
}
return map.entrySet()
.stream()
.map(entry -> entry.getKey() + "=" + entry.getValue())
.collect(joining(","));
}
}