[ONOS-7732] Automating switch workflow: api, app, and sample workflows
Change-Id: Iee87d4fe6cf61c1f8904d1d77df5f913a712b64a
diff --git a/apps/workflow/app/src/main/java/org/onosproject/workflow/impl/WorkflowNetConfigListener.java b/apps/workflow/app/src/main/java/org/onosproject/workflow/impl/WorkflowNetConfigListener.java
new file mode 100644
index 0000000..59a57e9
--- /dev/null
+++ b/apps/workflow/app/src/main/java/org/onosproject/workflow/impl/WorkflowNetConfigListener.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.workflow.impl;
+
+import org.onosproject.core.ApplicationId;
+import org.onosproject.net.config.ConfigFactory;
+import org.onosproject.net.config.NetworkConfigEvent;
+import org.onosproject.net.config.NetworkConfigListener;
+import org.onosproject.net.config.basics.SubjectFactories;
+import org.onosproject.workflow.api.DefaultWorkflowDescription;
+import org.onosproject.workflow.api.RpcDescription;
+import org.onosproject.workflow.api.WorkflowService;
+import org.onosproject.workflow.api.WorkflowException;
+import org.onosproject.workflow.api.DefaultWorkplaceDescription;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.ScheduledExecutorService;
+
+import static java.util.concurrent.Executors.newSingleThreadScheduledExecutor;
+import static org.onlab.util.Tools.groupedThreads;
+
+public class WorkflowNetConfigListener implements NetworkConfigListener {
+
+ private static final Logger log = LoggerFactory.getLogger(WorkflowNetConfigListener.class);
+
+ public static final String CONFIG_KEY = "workflow";
+ public static final String EXECUTOR_GROUPNAME = "onos/workflow-netcfg";
+ public static final String EXECUTOR_PATTERN = "netcfg-event-handler";
+
+ private final ConfigFactory<ApplicationId, WorkflowNetConfig> configFactory =
+ new ConfigFactory<ApplicationId, WorkflowNetConfig>(
+ SubjectFactories.APP_SUBJECT_FACTORY, WorkflowNetConfig.class, CONFIG_KEY) {
+ @Override
+ public WorkflowNetConfig createConfig() {
+ return new WorkflowNetConfig();
+ }
+ };
+
+ private final WorkflowService workflowService;
+
+ private final ScheduledExecutorService executor =
+ newSingleThreadScheduledExecutor(groupedThreads(EXECUTOR_GROUPNAME, EXECUTOR_PATTERN));
+
+ public WorkflowNetConfigListener(WorkflowService workflowService) {
+ this.workflowService = workflowService;
+ }
+
+ public ConfigFactory<ApplicationId, WorkflowNetConfig> getConfigFactory() {
+ return configFactory;
+ }
+
+ @Override
+ public boolean isRelevant(NetworkConfigEvent event) {
+ return true;
+ }
+
+ @Override
+ public void event(NetworkConfigEvent event) {
+ log.info("Configuration event: {}", event);
+ switch (event.type()) {
+ case CONFIG_ADDED:
+ case CONFIG_UPDATED:
+ if (!event.config().isPresent()) {
+ log.error("No configuration found");
+ return;
+ }
+ WorkflowNetConfig config = (WorkflowNetConfig) event.config().get();
+
+ //Single thread executor(locking is not required)
+ executor.execute(new Handler(workflowService, config));
+ break;
+ default:
+ break;
+ }
+ }
+
+ public static class Handler implements Runnable {
+
+ private WorkflowService workflowService;
+ private WorkflowNetConfig config;
+
+ public Handler(WorkflowService workflowService, WorkflowNetConfig config) {
+ this.workflowService = workflowService;
+ this.config = config;
+ }
+
+ @Override
+ public void run() {
+
+ try {
+ Collection<RpcDescription> rpcs = config.getRpcDescriptions();
+ log.info("" + rpcs);
+ for (RpcDescription rpc : rpcs) {
+ if (!rpcMap.containsKey(rpc.op())) {
+ log.error("Invalid RPC: {}", rpc);
+ continue;
+ }
+
+ rpcMap.get(rpc.op()).apply(this.workflowService, rpc);
+ }
+ } catch (WorkflowException e) {
+ e.printStackTrace();
+ }
+ }
+ }
+
+ @FunctionalInterface
+ public interface RpcCall {
+ void apply(WorkflowService workflowService, RpcDescription rpcDesc) throws WorkflowException;
+ }
+
+ private static Map<String, RpcCall> rpcMap = new HashMap<>();
+ static {
+ rpcMap.put("workplace.create",
+ (service, desc) -> service.createWorkplace(DefaultWorkplaceDescription.valueOf(desc.params())));
+ rpcMap.put("workplace.remove",
+ (service, desc) -> service.removeWorkplace(DefaultWorkplaceDescription.valueOf(desc.params())));
+ rpcMap.put("workflow.invoke",
+ (service, desc) -> service.invokeWorkflow(desc.params()));
+ rpcMap.put("workflow.terminate",
+ (service, desc) -> service.terminateWorkflow(DefaultWorkflowDescription.valueOf(desc.params())));
+ }
+}