Implement REST API for Hosts objects

Change-Id: Ie1d4f7c19c47d2d357dedf81016e4d4d197e4052

@@ -38,6 +38,10 @@
             <version>${project.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.easymock</groupId>
+            <artifactId>easymock</artifactId>
+        </dependency>
     </dependencies>
 
     <properties>

@@ -25,6 +25,8 @@ import org.onosproject.codec.JsonCodec;
 import org.onosproject.net.Annotations;
 import org.onosproject.net.ConnectPoint;
 import org.onosproject.net.Device;
+import org.onosproject.net.Host;
+import org.onosproject.net.HostLocation;
 import org.onosproject.net.Link;
 import org.onosproject.net.Port;
 import org.slf4j.Logger;
@@ -53,11 +55,13 @@ public class CodecManager implements CodecService {
         registerCodec(Port.class, new PortCodec());
         registerCodec(ConnectPoint.class, new ConnectPointCodec());
         registerCodec(Link.class, new LinkCodec());
+        registerCodec(Host.class, new HostCodec());
+        registerCodec(HostLocation.class, new HostLocationCodec());
         log.info("Started");
     }
 
     @Deactivate
-    public void deativate() {
+    public void deactivate() {
         codecs.clear();
         log.info("Stopped");
     }

+/*
+ * Copyright 2014 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.codec.impl;
+
+import org.onlab.packet.IpAddress;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.net.Host;
+import org.onosproject.net.HostLocation;
+
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Host JSON codec.
+ */
+public class HostCodec extends AnnotatedCodec<Host> {
+
+    @Override
+    public ObjectNode encode(Host host, CodecContext context) {
+        checkNotNull(host, "Host cannot be null");
+        final JsonCodec<HostLocation> locationCodec = new HostLocationCodec();
+        final ObjectNode result = context.mapper().createObjectNode()
+                .put("id", host.id().toString())
+                .put("mac", host.mac().toString())
+                .put("vlan", host.vlan().toString());
+
+        final ArrayNode jsonIpAddresses = result.putArray("ipAddresses");
+        for (final IpAddress ipAddress : host.ipAddresses()) {
+            jsonIpAddresses.add(ipAddress.toString());
+        }
+        result.set("ipAddresses", jsonIpAddresses);
+        result.set("location", locationCodec.encode(host.location(), context));
+
+        return annotate(result, host, context);
+    }
+
+}
+

+/*
+ * Copyright 2014 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.codec.impl;
+
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.net.HostLocation;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Host JSON codec.
+ */
+public class HostLocationCodec extends JsonCodec<HostLocation> {
+
+    @Override
+    public ObjectNode encode(HostLocation hostLocation, CodecContext context) {
+        checkNotNull(hostLocation, "Host location cannot be null");
+        return context.mapper().createObjectNode()
+                .put("elementId", hostLocation.elementId().toString())
+                .put("port", hostLocation.port().toString());
+    }
+
+}

+/*
+ * Copyright 2014 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;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+
+import org.onosproject.net.Host;
+import org.onosproject.net.host.HostService;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import static org.onosproject.net.HostId.hostId;
+
+/**
+ * REST resource for interacting with the inventory of hosts.
+ */
+@Path("hosts")
+public class HostsWebResource extends AbstractWebResource {
+
+    public static final String HOST_NOT_FOUND = "Host is not found";
+
+    @GET
+    @Produces(MediaType.APPLICATION_JSON)
+    public Response getHosts() {
+        final Iterable<Host> hosts = get(HostService.class).getHosts();
+        final ObjectNode root = encodeArray(Host.class, "hosts", hosts);
+        return ok(root.toString()).build();
+    }
+
+    @GET
+    @Produces(MediaType.APPLICATION_JSON)
+    @Path("{id}")
+    public Response getHostById(@PathParam("id") String id) {
+        final Host host = nullIsNotFound(get(HostService.class).getHost(hostId(id)),
+                HOST_NOT_FOUND);
+        final ObjectNode root = codec(Host.class).encode(host, this);
+        return ok(root.toString()).build();
+    }
+
+    @GET
+    @Produces(MediaType.APPLICATION_JSON)
+    @Path("{mac}/{vlan}")
+    public Response getHostByMacAndVlan(@PathParam("mac") String mac,
+                                        @PathParam("vlan") String vlan) {
+        final Host host = nullIsNotFound(get(HostService.class).getHost(hostId(mac + "/" + vlan)),
+                HOST_NOT_FOUND);
+        final ObjectNode root = codec(Host.class).encode(host, this);
+        return ok(root.toString()).build();
+    }
+}
+

@@ -37,6 +37,7 @@
 
                 org.onosproject.rest.DevicesWebResource,
                 org.onosproject.rest.LinksWebResource,
+                org.onosproject.rest.HostsWebResource,
                 org.onosproject.rest.ConfigResource
             </param-value>
         </init-param>

@@ -45,7 +45,7 @@ public class GreetResourceTest extends JerseyTest {
     public void basics() {
         WebResource rs = resource();
         String response = rs.path("greet").get(String.class);
-        assertTrue("incorrect response", response.contains("Whazup "));
+        assertTrue("incorrect response", response.contains("greeting"));
     }
 
 }

+/*
+ * Copyright 2014 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;
+
+
+import java.util.HashSet;
+import java.util.Set;
+
+import org.hamcrest.Description;
+import org.hamcrest.TypeSafeMatcher;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.osgi.ServiceDirectory;
+import org.onlab.osgi.TestServiceDirectory;
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
+import org.onlab.rest.BaseResource;
+import org.onosproject.codec.CodecService;
+import org.onosproject.codec.impl.CodecManager;
+import org.onosproject.net.DefaultHost;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.Host;
+import org.onosproject.net.HostId;
+import org.onosproject.net.HostLocation;
+import org.onosproject.net.host.HostService;
+import org.onosproject.net.provider.ProviderId;
+
+import com.eclipsesource.json.JsonArray;
+import com.eclipsesource.json.JsonObject;
+import com.google.common.collect.ImmutableSet;
+import com.sun.jersey.api.client.WebResource;
+import com.sun.jersey.test.framework.JerseyTest;
+
+import static org.easymock.EasyMock.createMock;
+import static org.easymock.EasyMock.expect;
+import static org.easymock.EasyMock.replay;
+import static org.easymock.EasyMock.verify;
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.hasSize;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.notNullValue;
+import static org.junit.Assert.assertThat;
+import static org.onlab.packet.MacAddress.valueOf;
+import static org.onlab.packet.VlanId.vlanId;
+import static org.onosproject.net.PortNumber.portNumber;
+
+/**
+ * Simple example on how to write a JAX-RS unit test using Jersey test framework.
+ * A base class should/will be created to provide further assistance for testing.
+ */
+public class HostResourceTest extends JerseyTest {
+    final HostService mockHostService = createMock(HostService.class);
+    final HashSet<Host> hosts = new HashSet<>();
+
+    public HostResourceTest() {
+        super("org.onosproject.rest");
+    }
+
+    @Before
+    public void setUp() {
+        expect(mockHostService.getHosts()).andReturn(hosts).anyTimes();
+
+        // Register the services needed for the test
+        final CodecManager codecService =  new CodecManager();
+        codecService.activate();
+        ServiceDirectory testDirectory =
+                new TestServiceDirectory()
+                        .add(HostService.class, mockHostService)
+                        .add(CodecService.class, codecService);
+
+        BaseResource.setServiceDirectory(testDirectory);
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        super.tearDown();
+        verify(mockHostService);
+    }
+
+    /**
+     * Hamcrest matcher to check that a host representation in JSON matches
+     * the actual host.
+     */
+    public static class HostJsonMatcher extends TypeSafeMatcher<JsonObject> {
+        private final Host host;
+        private String reason = "";
+
+        public HostJsonMatcher(Host hostValue) {
+            host = hostValue;
+        }
+
+        @Override
+        public boolean matchesSafely(JsonObject jsonHost) {
+            // Check id
+            final String jsonId = jsonHost.get("id").asString();
+            if (!jsonId.equals(host.id().toString())) {
+                reason = "id " + host.id().toString();
+                return false;
+            }
+
+            // Check vlan id
+            final String jsonVlanId = jsonHost.get("vlan").asString();
+            if (!jsonVlanId.equals(host.vlan().toString())) {
+                reason = "vlan id " + host.vlan().toString();
+                return false;
+            }
+
+            // Check mac address
+            final String jsonMacAddress = jsonHost.get("mac").asString();
+            if (!jsonMacAddress.equals(host.mac().toString())) {
+                reason = "mac address " + host.mac().toString();
+                return false;
+            }
+
+            // Check location element id
+            final JsonObject jsonLocation = jsonHost.get("location").asObject();
+            final String jsonLocationElementId = jsonLocation.get("elementId").asString();
+            if (!jsonLocationElementId.equals(host.location().elementId().toString())) {
+                reason = "location element id " + host.location().elementId().toString();
+                return false;
+            }
+
+            // Check location port number
+            final String jsonLocationPortNumber = jsonLocation.get("port").asString();
+            if (!jsonLocationPortNumber.equals(host.location().port().toString())) {
+                reason = "location portNumber " + host.location().port().toString();
+                return false;
+            }
+
+            //  Check Ip Addresses
+            final JsonArray jsonHostIps = jsonHost.get("ipAddresses").asArray();
+            final Set<IpAddress> expectedHostIps = host.ipAddresses();
+            if (jsonHostIps.size() != expectedHostIps.size()) {
+                reason = "IP address arrays differ in size";
+                return false;
+            }
+
+            return true;
+        }
+
+        @Override
+        public void describeTo(Description description) {
+            description.appendText(reason);
+        }
+    }
+
+    /**
+     * Factory to allocate a host array matcher.
+     *
+     * @param host host object we are looking for
+     * @return matcher
+     */
+    private static HostJsonMatcher matchesHost(Host host) {
+        return new HostJsonMatcher(host);
+    }
+
+    /**
+     * Hamcrest matcher to check that a host is represented properly in a JSON
+     * array of hosts.
+     */
+    public static class HostJsonArrayMatcher extends TypeSafeMatcher<JsonArray> {
+        private final Host host;
+        private String reason = "";
+
+        public HostJsonArrayMatcher(Host hostValue) {
+            host = hostValue;
+        }
+
+        @Override
+        public boolean matchesSafely(JsonArray json) {
+            boolean hostFound = false;
+            final int expectedAttributes = 5;
+            for (int jsonHostIndex = 0; jsonHostIndex < json.size();
+                 jsonHostIndex++) {
+
+                final JsonObject jsonHost = json.get(jsonHostIndex).asObject();
+
+                if (jsonHost.names().size() != expectedAttributes) {
+                    reason = "Found a host with the wrong number of attributes";
+                    return false;
+                }
+
+                final String jsonHostId = jsonHost.get("id").asString();
+                if (jsonHostId.equals(host.id().toString())) {
+                    hostFound = true;
+
+                    //  We found the correct host, check attribute values
+                    assertThat(jsonHost, matchesHost(host));
+                }
+            }
+            if (!hostFound) {
+                reason = "Host with id " + host.id().toString() + " not found";
+                return false;
+            } else {
+                return true;
+            }
+        }
+
+        @Override
+        public void describeTo(Description description) {
+            description.appendText(reason);
+        }
+    }
+
+    /**
+     * Factory to allocate a host array matcher.
+     *
+     * @param host host object we are looking for
+     * @return matcher
+     */
+    private static HostJsonArrayMatcher hasHost(Host host) {
+        return new HostJsonArrayMatcher(host);
+    }
+
+    /**
+     * Tests the result of the rest api GET when there are no hosts.
+     */
+    @Test
+    public void testHostsEmptyArray() {
+        replay(mockHostService);
+        WebResource rs = resource();
+        String response = rs.path("hosts").get(String.class);
+        assertThat(response, is("{\"hosts\":[]}"));
+    }
+
+    /**
+     * Tests the result of the rest api GET when hosts are defined.
+     */
+    @Test
+    public void testHostsArray() {
+        replay(mockHostService);
+        final ProviderId pid = new ProviderId("of", "foo");
+        final MacAddress mac1 = MacAddress.valueOf("00:00:11:00:00:01");
+        final Set<IpAddress> ips1 = ImmutableSet.of(IpAddress.valueOf("1111:1111:1111:1::"));
+        final Host host1 =
+                new DefaultHost(pid, HostId.hostId(mac1), valueOf(1), vlanId((short) 1),
+                        new HostLocation(DeviceId.deviceId("1"), portNumber(11), 1),
+                        ips1);
+        final MacAddress mac2 = MacAddress.valueOf("00:00:11:00:00:02");
+        final Set<IpAddress> ips2 = ImmutableSet.of(
+                IpAddress.valueOf("2222:2222:2222:1::"),
+                IpAddress.valueOf("2222:2222:2222:2::"));
+        final Host host2 =
+                new DefaultHost(pid, HostId.hostId(mac2), valueOf(2), vlanId((short) 2),
+                        new HostLocation(DeviceId.deviceId("2"), portNumber(22), 2),
+                        ips2);
+        hosts.add(host1);
+        hosts.add(host2);
+        WebResource rs = resource();
+        String response = rs.path("hosts").get(String.class);
+        assertThat(response, containsString("{\"hosts\":["));
+
+        final JsonObject result = JsonObject.readFrom(response);
+        assertThat(result, notNullValue());
+
+        assertThat(result.names(), hasSize(1));
+        assertThat(result.names().get(0), is("hosts"));
+
+        final JsonArray hosts = result.get("hosts").asArray();
+        assertThat(hosts, notNullValue());
+
+        assertThat(hosts, hasHost(host1));
+        assertThat(hosts, hasHost(host2));
+    }
+
+    /**
+     * Tests fetch of one host by Id.
+     */
+    @Test
+    public void testSingleHostByIdFetch() {
+        final ProviderId pid = new ProviderId("of", "foo");
+        final MacAddress mac1 = MacAddress.valueOf("00:00:11:00:00:01");
+        final Set<IpAddress> ips1 = ImmutableSet.of(IpAddress.valueOf("1111:1111:1111:1::"));
+        final Host host1 =
+                new DefaultHost(pid, HostId.hostId(mac1), valueOf(1), vlanId((short) 1),
+                        new HostLocation(DeviceId.deviceId("1"), portNumber(11), 1),
+                        ips1);
+
+        hosts.add(host1);
+
+        expect(mockHostService.getHost(HostId.hostId("00:00:11:00:00:01/1")))
+                .andReturn(host1)
+                .anyTimes();
+        replay(mockHostService);
+
+        WebResource rs = resource();
+        String response = rs.path("hosts/00:00:11:00:00:01%2F1").get(String.class);
+        final JsonObject result = JsonObject.readFrom(response);
+        assertThat(result, matchesHost(host1));
+    }
+
+    /**
+     * Tests fetch of one host by mac and vlan.
+     */
+    @Test
+    public void testSingleHostByMacAndVlanFetch() {
+        final ProviderId pid = new ProviderId("of", "foo");
+        final MacAddress mac1 = MacAddress.valueOf("00:00:11:00:00:01");
+        final Set<IpAddress> ips1 = ImmutableSet.of(IpAddress.valueOf("1111:1111:1111:1::"));
+        final Host host1 =
+                new DefaultHost(pid, HostId.hostId(mac1), valueOf(1), vlanId((short) 1),
+                        new HostLocation(DeviceId.deviceId("1"), portNumber(11), 1),
+                        ips1);
+
+        hosts.add(host1);
+
+        expect(mockHostService.getHost(HostId.hostId("00:00:11:00:00:01/1")))
+                .andReturn(host1)
+                .anyTimes();
+        replay(mockHostService);
+
+        WebResource rs = resource();
+        String response = rs.path("hosts/00:00:11:00:00:01/1").get(String.class);
+        final JsonObject result = JsonObject.readFrom(response);
+        assertThat(result, matchesHost(host1));
+    }
+
+}
+