ONOS-3692 Southbound Rest provider and protocol

Change-Id: I74a5752d4fce1df88828fa6c531979ab7c30a26a
t
diff --git a/protocols/rest/api/src/main/java/org/onosproject/protocol/rest/DefaultRestSBDevice.java b/protocols/rest/api/src/main/java/org/onosproject/protocol/rest/DefaultRestSBDevice.java
new file mode 100644
index 0000000..baf26cb
--- /dev/null
+++ b/protocols/rest/api/src/main/java/org/onosproject/protocol/rest/DefaultRestSBDevice.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2016 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.protocol.rest;
+
+import com.google.common.base.Preconditions;
+import org.onlab.packet.IpAddress;
+import org.onosproject.net.DeviceId;
+
+import java.util.Objects;
+
+/**
+ * Default implementation for Rest devices.
+ */
+public class DefaultRestSBDevice implements RestSBDevice {
+    private static final String REST = "rest";
+    private static final String COLON = ":";
+    private final IpAddress ip;
+    private final int port;
+    private final String name;
+    private final String password;
+    private boolean isActive;
+    private String protocol;
+
+    public DefaultRestSBDevice(IpAddress ip, int port, String name, String password,
+                               String protocol, boolean isActive) {
+        Preconditions.checkNotNull(ip, "IP address cannot be null");
+        Preconditions.checkArgument(port > 0, "Port address cannot be negative");
+        Preconditions.checkNotNull(protocol, "protocol address cannot be null");
+        this.ip = ip;
+        this.port = port;
+        this.name = name;
+        this.password = password;
+        this.isActive = isActive;
+        this.protocol = protocol;
+    }
+
+    @Override
+    public IpAddress ip() {
+        return ip;
+    }
+
+    @Override
+    public int port() {
+        return port;
+    }
+
+    @Override
+    public String name() {
+        return name;
+    }
+
+    @Override
+    public String password() {
+        return password;
+    }
+
+    @Override
+    public DeviceId deviceId() {
+        return DeviceId.deviceId(REST + COLON + ip + COLON + port);
+    }
+
+    @Override
+    public void setActive(boolean active) {
+        isActive = active;
+    }
+
+    @Override
+    public boolean isActive() {
+        return isActive;
+    }
+
+    @Override
+    public String protocol() {
+        return protocol;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this) {
+            return true;
+        }
+        if (!(obj instanceof RestSBDevice)) {
+            return false;
+        }
+        RestSBDevice device = (RestSBDevice) obj;
+        return this.name.equals(device.name()) && this.ip.equals(device.ip()) &&
+                this.port == device.port();
+
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(ip, port);
+    }
+
+}
diff --git a/protocols/rest/api/src/main/java/org/onosproject/protocol/rest/RestSBController.java b/protocols/rest/api/src/main/java/org/onosproject/protocol/rest/RestSBController.java
new file mode 100644
index 0000000..28d5617
--- /dev/null
+++ b/protocols/rest/api/src/main/java/org/onosproject/protocol/rest/RestSBController.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright 2016 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.protocol.rest;
+
+import org.onlab.packet.IpAddress;
+import org.onosproject.net.DeviceId;
+
+import java.io.InputStream;
+import java.util.Map;
+
+/**
+ * Abstraction of an REST controller. Serves as a one stop shop for obtaining
+ * Rest southbound devices and (un)register listeners.
+ */
+public interface RestSBController {
+
+    /**
+     * Returns all the devices known to this controller.
+     *
+     * @return map of devices
+     */
+    Map<DeviceId, RestSBDevice> getDevices();
+
+    /**
+     * Returns a device by node identifier.
+     *
+     * @param deviceInfo node identifier
+     * @return RestSBDevice rest device
+     */
+    RestSBDevice getDevice(DeviceId deviceInfo);
+
+    /**
+     * Returns a device by Ip and Port.
+     *
+     * @param ip   device ip
+     * @param port device port
+     * @return RestSBDevice rest device
+     */
+    RestSBDevice getDevice(IpAddress ip, int port);
+
+    /**
+     * Adds a device to the device map.
+     *
+     * @param device to be added
+     */
+    void addDevice(RestSBDevice device);
+
+    /**
+     * Removes the device from the devices map.
+     *
+     * @param device to be removed
+     */
+    void removeDevice(RestSBDevice device);
+
+    /**
+     * Does a REST POST request with specified parameters to the device.
+     *
+     * @param device    device to make the request to
+     * @param request   url of the request
+     * @param payload   payload of the request as an InputStream
+     * @param mediaType type of content in the payload i.e. application/json
+     * @return true if operation returned 200, 201, 202, false otherwise
+     */
+    boolean post(DeviceId device, String request, InputStream payload, String mediaType);
+
+    /**
+     * Does a REST PUT request with specified parameters to the device.
+     *
+     * @param device    device to make the request to
+     * @param request   resource path of the request
+     * @param payload   payload of the request as an InputStream
+     * @param mediaType type of content in the payload i.e. application/json
+     * @return true if operation returned 200, 201, 202, false otherwise
+     */
+    boolean put(DeviceId device, String request, InputStream payload, String mediaType);
+
+    /**
+     * Does a REST GET request with specified parameters to the device.
+     *
+     * @param device  device to make the request to
+     * @param request url of the request
+     * @param mediaType format to retrieve the content in
+     * @return an inputstream of data from the reply.
+     */
+    InputStream get(DeviceId device, String request, String mediaType);
+
+    /**
+     * Does a REST DELETE request with specified parameters to the device.
+     *
+     * @param device    device to make the request to
+     * @param request   url of the request
+     * @param payload   payload of the request as an InputStream
+     * @param mediaType type of content in the payload i.e. application/json
+     * @return true if operation returned 200 false otherwise
+     */
+    boolean delete(DeviceId device, String request, InputStream payload, String mediaType);
+
+}
diff --git a/protocols/rest/api/src/main/java/org/onosproject/protocol/rest/RestSBDevice.java b/protocols/rest/api/src/main/java/org/onosproject/protocol/rest/RestSBDevice.java
new file mode 100644
index 0000000..6b76989
--- /dev/null
+++ b/protocols/rest/api/src/main/java/org/onosproject/protocol/rest/RestSBDevice.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2016 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.protocol.rest;
+
+import org.onlab.packet.IpAddress;
+import org.onosproject.net.DeviceId;
+
+/**
+ * Represents an abstraction of a Rest Device in ONOS.
+ */
+public interface RestSBDevice {
+    /**
+     * Returns the ip of this device.
+     *
+     * @return ip
+     */
+    IpAddress ip();
+
+    /**
+     * Returns the password of this device.
+     *
+     * @return port
+     */
+    int port();
+
+    /**
+     * Returns the name of this device.
+     *
+     * @return name
+     */
+    String name();
+
+    /**
+     * Returns the password of this device.
+     *
+     * @return password
+     */
+    String password();
+
+    /**
+     * Returns the ONOS deviceID for this device.
+     *
+     * @return DeviceId
+     */
+    DeviceId deviceId();
+
+    /**
+     * Sets or unsets the state of the device.
+     *
+     * @param active boolean
+     */
+    void setActive(boolean active);
+
+    /**
+     * Returns the state of this device.
+     *
+     * @return state
+     */
+    boolean isActive();
+
+    /**
+     * Returns the protocol for the REST request, usually HTTP o HTTPS.
+     *
+     * @return protocol
+     */
+    String protocol();
+
+}
diff --git a/protocols/rest/api/src/main/java/org/onosproject/protocol/rest/package-info.java b/protocols/rest/api/src/main/java/org/onosproject/protocol/rest/package-info.java
new file mode 100644
index 0000000..a2ad7b6
--- /dev/null
+++ b/protocols/rest/api/src/main/java/org/onosproject/protocol/rest/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2016 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.
+ */
+
+/**
+ * REST southbound protocols libraries.
+ */
+package org.onosproject.protocol.rest;