Add a prometheus exporter
Change-Id: I2989d87c2a83eed31c6617694bdcb78bf9b38553
diff --git a/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/impl/PrometheusTelemetryConfigManager.java b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/impl/PrometheusTelemetryConfigManager.java
new file mode 100644
index 0000000..23cc240
--- /dev/null
+++ b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/impl/PrometheusTelemetryConfigManager.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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 org.onosproject.openstacktelemetry.impl;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Modified;
+import org.apache.felix.scr.annotations.Property;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.apache.felix.scr.annotations.Service;
+import org.onlab.util.Tools;
+import org.onosproject.cfg.ComponentConfigService;
+import org.onosproject.openstacktelemetry.api.PrometheusTelemetryAdminService;
+import org.onosproject.openstacktelemetry.api.PrometheusTelemetryConfigService;
+import org.onosproject.openstacktelemetry.api.config.TelemetryConfig;
+import org.onosproject.openstacktelemetry.config.DefaultPrometheusTelemetryConfig;
+import org.osgi.service.component.ComponentContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Dictionary;
+
+import static org.onosproject.openstacktelemetry.api.Constants.DEFAULT_DISABLE;
+import static org.onosproject.openstacktelemetry.api.Constants.DEFAULT_ENABLE;
+import static org.onosproject.openstacktelemetry.api.Constants.DEFAULT_PROMETHEUS_EXPORTER_IP;
+import static org.onosproject.openstacktelemetry.api.Constants.DEFAULT_PROMETHEUS_EXPORTER_PORT;
+import static org.onosproject.openstacktelemetry.util.OpenstackTelemetryUtil.getBooleanProperty;
+import static org.onosproject.openstacktelemetry.util.OpenstackTelemetryUtil.initTelemetryService;
+
+/**
+ * Prometheus exporter configuration manager for publishing openstack telemetry.
+ */
+@Component(immediate = true)
+@Service
+public class PrometheusTelemetryConfigManager implements PrometheusTelemetryConfigService {
+
+ private final Logger log = LoggerFactory.getLogger(getClass());
+
+ private static final String ENABLE_SERVICE = "enableService";
+ private static final String ADDRESS = "address";
+ private static final String PORT = "port";
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected ComponentConfigService componentConfigService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected PrometheusTelemetryAdminService prometheusTelemetryAdminService;
+
+ @Property(name = ADDRESS, value = DEFAULT_PROMETHEUS_EXPORTER_IP,
+ label = "Default IP address of prometheus exporter")
+ protected String address = DEFAULT_PROMETHEUS_EXPORTER_IP;
+
+ @Property(name = PORT, intValue = DEFAULT_PROMETHEUS_EXPORTER_PORT,
+ label = "Default port number of prometheus exporter")
+ protected Integer port = DEFAULT_PROMETHEUS_EXPORTER_PORT;
+
+ @Property(name = ENABLE_SERVICE, boolValue = DEFAULT_ENABLE,
+ label = "Specify the default behavior of telemetry service")
+ protected Boolean enableService = DEFAULT_ENABLE;
+
+ @Activate
+ protected void activate(ComponentContext context) {
+ componentConfigService.registerProperties(getClass());
+ if (enableService) {
+ prometheusTelemetryAdminService.start(getConfig());
+ }
+ log.info("Started");
+ }
+
+ @Deactivate
+ protected void deactivate() {
+ componentConfigService.unregisterProperties(getClass(), false);
+ if (enableService) {
+ prometheusTelemetryAdminService.stop();
+ }
+ log.info("Stopped");
+ }
+
+ @Modified
+ private void modified(ComponentContext context) {
+ readComponentConfiguration(context);
+ initTelemetryService(prometheusTelemetryAdminService, getConfig(), enableService);
+ log.info("Modified");
+ }
+
+ @Override
+ public TelemetryConfig getConfig() {
+ return new DefaultPrometheusTelemetryConfig.DefaultBuilder()
+ .withAddress(address)
+ .withPort(port)
+ .build();
+ }
+
+ /**
+ * Extracts properties from the component configuration context.
+ *
+ * @param context the component context
+ */
+ private void readComponentConfiguration(ComponentContext context) {
+ Dictionary<?, ?> properties = context.getProperties();
+
+ String addressStr = Tools.get(properties, ADDRESS);
+ address = addressStr != null ? addressStr : DEFAULT_PROMETHEUS_EXPORTER_IP;
+ log.info("Configured. Prometheus exporter address is {}", address);
+
+ Integer portConfigured = Tools.getIntegerProperty(properties, PORT);
+ if (portConfigured == null) {
+ port = DEFAULT_PROMETHEUS_EXPORTER_PORT;
+ log.info("Prometheus exporter port is NOT configured, default value is {}", port);
+ } else {
+ port = portConfigured;
+ log.info("Configured. Prometheus exporter port is {}", port);
+ }
+
+ Boolean enableServiceConfigured = getBooleanProperty(properties, ENABLE_SERVICE);
+ if (enableServiceConfigured == null) {
+ enableService = DEFAULT_DISABLE;
+ log.info("Prometheus service enable flag is NOT " +
+ "configured, default value is {}", enableService);
+ } else {
+ enableService = enableServiceConfigured;
+ log.info("Configured. Prometheus service enable flag is {}", enableService);
+ }
+ }
+}