1 files changed, 221 insertions, 0 deletions
diff --git a/framework/src/onos/web/api/src/main/java/org/onosproject/rest/resources/IntentsWebResource.java b/framework/src/onos/web/api/src/main/java/org/onosproject/rest/resources/IntentsWebResource.java
new file mode 100644
index 00000000..a4dd9380
--- /dev/null
+++ b/framework/src/onos/web/api/src/main/java/org/onosproject/rest/resources/IntentsWebResource.java
@@ -0,0 +1,221 @@
+/*
+ * Copyright 2014-2015 Open Networking Laboratory
+ *
+ * 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.rest.resources;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Objects;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+import javax.ws.rs.Consumes;
+import javax.ws.rs.DELETE;
+import javax.ws.rs.GET;
+import javax.ws.rs.POST;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.Context;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.UriBuilder;
+import javax.ws.rs.core.UriInfo;
+
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.net.intent.HostToHostIntent;
+import org.onosproject.net.intent.Intent;
+import org.onosproject.net.intent.IntentEvent;
+import org.onosproject.net.intent.IntentListener;
+import org.onosproject.net.intent.IntentService;
+import org.onosproject.net.intent.IntentState;
+import org.onosproject.net.intent.Key;
+import org.onosproject.net.intent.PointToPointIntent;
+import org.onosproject.rest.AbstractWebResource;
+import org.slf4j.Logger;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import static org.onlab.util.Tools.nullIsNotFound;
+import static org.onosproject.net.intent.IntentState.FAILED;
+import static org.onosproject.net.intent.IntentState.WITHDRAWN;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Query, submit and withdraw network intents.
+ */
+@Path("intents")
+public class IntentsWebResource extends AbstractWebResource {
+    @Context
+    UriInfo uriInfo;
+
+    private static final Logger log = getLogger(IntentsWebResource.class);
+    private static final int WITHDRAW_EVENT_TIMEOUT_SECONDS = 5;
+
+    public static final String INTENT_NOT_FOUND = "Intent is not found";
+
+    /**
+     * Get all intents.
+     * Returns array containing all the intents in the system.
+     *
+     * @return array of all the intents in the system
+     */
+    @GET
+    @Produces(MediaType.APPLICATION_JSON)
+    public Response getIntents() {
+        final Iterable<Intent> intents = get(IntentService.class).getIntents();
+        final ObjectNode root = encodeArray(Intent.class, "intents", intents);
+        return ok(root).build();
+    }
+
+    /**
+     * Get intent by application and key.
+     * Returns details of the specified intent.
+     *
+     * @param appId application identifier
+     * @param key   intent key
+     * @return intent data
+     */
+    @GET
+    @Produces(MediaType.APPLICATION_JSON)
+    @Path("{appId}/{key}")
+    public Response getIntentById(@PathParam("appId") String appId,
+                                  @PathParam("key") String key) {
+        final ApplicationId app = get(CoreService.class).getAppId(appId);
+
+        Intent intent = get(IntentService.class).getIntent(Key.of(key, app));
+        if (intent == null) {
+            long numericalKey = Long.decode(key);
+            intent = get(IntentService.class).getIntent(Key.of(numericalKey, app));
+        }
+        nullIsNotFound(intent, INTENT_NOT_FOUND);
+
+        final ObjectNode root;
+        if (intent instanceof HostToHostIntent) {
+            root = codec(HostToHostIntent.class).encode((HostToHostIntent) intent, this);
+        } else if (intent instanceof PointToPointIntent) {
+            root = codec(PointToPointIntent.class).encode((PointToPointIntent) intent, this);
+        } else {
+            root = codec(Intent.class).encode(intent, this);
+        }
+        return ok(root).build();
+    }
+
+    class DeleteListener implements IntentListener {
+        final Key key;
+        final CountDownLatch latch;
+
+        DeleteListener(Key key, CountDownLatch latch) {
+            this.key = key;
+            this.latch = latch;
+        }
+
+        @Override
+        public void event(IntentEvent event) {
+            if (Objects.equals(event.subject().key(), key) &&
+                    (event.type() == IntentEvent.Type.WITHDRAWN ||
+                            event.type() == IntentEvent.Type.FAILED)) {
+                latch.countDown();
+            }
+        }
+    }
+
+    /**
+     * Submit a new intent.
+     * Creates and submits intent from the JSON request.
+     *
+     * @param stream input JSON
+     * @return status of the request - CREATED if the JSON is correct,
+     * BAD_REQUEST if the JSON is invalid
+     */
+    @POST
+    @Consumes(MediaType.APPLICATION_JSON)
+    @Produces(MediaType.APPLICATION_JSON)
+    public Response createIntent(InputStream stream) {
+        try {
+            IntentService service = get(IntentService.class);
+            ObjectNode root = (ObjectNode) mapper().readTree(stream);
+            Intent intent = codec(Intent.class).decode(root, this);
+            service.submit(intent);
+            UriBuilder locationBuilder = uriInfo.getBaseUriBuilder()
+                    .path("intents")
+                    .path(intent.appId().name())
+                    .path(Long.toString(intent.id().fingerprint()));
+            return Response
+                    .created(locationBuilder.build())
+                    .build();
+        } catch (IOException ioe) {
+            throw new IllegalArgumentException(ioe);
+        }
+    }
+
+    /**
+     * Withdraw intent.
+     * Withdraws the specified intent from the system.
+     *
+     * @param appId application identifier
+     * @param key   intent key
+     */
+    @DELETE
+    @Path("{appId}/{key}")
+    public void deleteIntentById(@PathParam("appId") String appId,
+                                 @PathParam("key") String key) {
+        final ApplicationId app = get(CoreService.class).getAppId(appId);
+
+        Intent intent = get(IntentService.class).getIntent(Key.of(key, app));
+        IntentService service = get(IntentService.class);
+
+        if (intent == null) {
+            intent = service
+                    .getIntent(Key.of(Long.decode(key), app));
+        }
+        if (intent == null) {
+            // No such intent.  REST standards recommend a positive status code
+            // in this case.
+            return;
+        }
+
+
+        Key k = intent.key();
+
+        // set up latch and listener to track uninstall progress
+        CountDownLatch latch = new CountDownLatch(1);
+
+        IntentListener listener = new DeleteListener(k, latch);
+        service.addListener(listener);
+
+        try {
+            // request the withdraw
+            service.withdraw(intent);
+
+            try {
+                latch.await(WITHDRAW_EVENT_TIMEOUT_SECONDS, TimeUnit.SECONDS);
+            } catch (InterruptedException e) {
+                log.info("REST Delete operation timed out waiting for intent {}", k);
+            }
+            // double check the state
+            IntentState state = service.getIntentState(k);
+            if (state == WITHDRAWN || state == FAILED) {
+                service.purge(intent);
+            }
+
+        } finally {
+            // clean up the listener
+            service.removeListener(listener);
+        }
+    }
+
+}