[ONOS-7262] Cfm improvements to allow RMeps and Mds and Mas to be added and deleted

Change-Id: Ibffb13d046bfb29dbe88de7b558c95fbf9db046d
diff --git a/apps/cfm/src/main/java/org/onosproject/cfm/cli/CfmMdListMdCommand.java b/apps/cfm/src/main/java/org/onosproject/cfm/cli/CfmMdListMdCommand.java
index 341bd7d..f3c5b6e 100644
--- a/apps/cfm/src/main/java/org/onosproject/cfm/cli/CfmMdListMdCommand.java
+++ b/apps/cfm/src/main/java/org/onosproject/cfm/cli/CfmMdListMdCommand.java
@@ -20,6 +20,12 @@
 import org.onosproject.cli.AbstractShellCommand;
 import org.onosproject.incubator.net.l2monitoring.cfm.MaintenanceAssociation;
 import org.onosproject.incubator.net.l2monitoring.cfm.MaintenanceDomain;
+import org.onosproject.incubator.net.l2monitoring.cfm.identifier.MaId2Octet;
+import org.onosproject.incubator.net.l2monitoring.cfm.identifier.MaIdCharStr;
+import org.onosproject.incubator.net.l2monitoring.cfm.identifier.MaIdIccY1731;
+import org.onosproject.incubator.net.l2monitoring.cfm.identifier.MaIdPrimaryVid;
+import org.onosproject.incubator.net.l2monitoring.cfm.identifier.MaIdRfc2685VpnId;
+import org.onosproject.incubator.net.l2monitoring.cfm.identifier.MaIdShort;
 import org.onosproject.incubator.net.l2monitoring.cfm.identifier.MdId;
 import org.onosproject.incubator.net.l2monitoring.cfm.identifier.MdIdCharStr;
 import org.onosproject.incubator.net.l2monitoring.cfm.identifier.MdIdDomainName;
@@ -45,29 +51,7 @@
         CfmMdService service = get(CfmMdService.class);
 
         if (name != null) {
-            String[] nameParts = name.split("[()]");
-            if (nameParts.length != 2) {
-                throw new IllegalArgumentException("Invalid name format. " +
-                        "Must be in the format of <identifier(name-type)>");
-            }
-
-            MdId mdId = null;
-            MdId.MdNameType nameTypeEnum = MdId.MdNameType.valueOf(nameParts[1]);
-            switch (nameTypeEnum) {
-                case DOMAINNAME:
-                    mdId = MdIdDomainName.asMdId(nameParts[0]);
-                    break;
-                case MACANDUINT:
-                    mdId = MdIdMacUint.asMdId(nameParts[0]);
-                    break;
-                case NONE:
-                    mdId = MdIdNone.asMdId();
-                    break;
-                case CHARACTERSTRING:
-                default:
-                    mdId = MdIdCharStr.asMdId(nameParts[0]);
-            }
-
+            MdId mdId = parseMdName(name);
             print("Maintenance Domain:");
             Optional<MaintenanceDomain> md = service.getMaintenanceDomain(mdId);
             print(printMd(md));
@@ -131,4 +115,59 @@
 
         return sb.toString();
     }
+
+    public static MdId parseMdName(String mdStr) {
+        String[] nameParts = mdStr.split("[()]");
+        if (nameParts.length != 2) {
+            throw new IllegalArgumentException("Invalid name format. " +
+                    "Must be in the format of <identifier(name-type)>");
+        }
+
+        MdId mdId = null;
+        MdId.MdNameType nameTypeEnum = MdId.MdNameType.valueOf(nameParts[1]);
+        switch (nameTypeEnum) {
+            case DOMAINNAME:
+                mdId = MdIdDomainName.asMdId(nameParts[0]);
+                break;
+            case MACANDUINT:
+                mdId = MdIdMacUint.asMdId(nameParts[0]);
+                break;
+            case NONE:
+                mdId = MdIdNone.asMdId();
+                break;
+            case CHARACTERSTRING:
+            default:
+                mdId = MdIdCharStr.asMdId(nameParts[0]);
+        }
+        return mdId;
+    }
+
+    public static MaIdShort parseMaName(String maStr) {
+        String[] nameParts = maStr.split("[()]");
+        if (nameParts.length != 2) {
+            throw new IllegalArgumentException("Invalid name format. " +
+                    "Must be in the format of <identifier(name-type)>");
+        }
+
+        MaIdShort maId = null;
+        MaIdShort.MaIdType nameTypeEnum = MaIdShort.MaIdType.valueOf(nameParts[1]);
+        switch (nameTypeEnum) {
+            case ICCY1731:
+                maId = MaIdIccY1731.asMaId(nameParts[0]);
+                break;
+            case PRIMARYVID:
+                maId = MaIdPrimaryVid.asMaId(nameParts[0]);
+                break;
+            case RFC2685VPNID:
+                maId = MaIdRfc2685VpnId.asMaIdHex(nameParts[0]);
+                break;
+            case TWOOCTET:
+                maId = MaId2Octet.asMaId(nameParts[0]);
+            case CHARACTERSTRING:
+            default:
+                maId = MaIdCharStr.asMaId(nameParts[0]);
+        }
+        return maId;
+    }
+
 }
diff --git a/apps/cfm/src/main/java/org/onosproject/cfm/cli/CfmMepListCommand.java b/apps/cfm/src/main/java/org/onosproject/cfm/cli/CfmMepListCommand.java
new file mode 100644
index 0000000..b406947
--- /dev/null
+++ b/apps/cfm/src/main/java/org/onosproject/cfm/cli/CfmMepListCommand.java
@@ -0,0 +1,173 @@
+/*
+ * 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.cfm.cli;
+
+import org.apache.karaf.shell.commands.Argument;
+import org.apache.karaf.shell.commands.Command;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.incubator.net.l2monitoring.cfm.MepEntry;
+import org.onosproject.incubator.net.l2monitoring.cfm.identifier.MaIdShort;
+import org.onosproject.incubator.net.l2monitoring.cfm.identifier.MdId;
+import org.onosproject.incubator.net.l2monitoring.cfm.identifier.MepId;
+import org.onosproject.incubator.net.l2monitoring.cfm.identifier.MepKeyId;
+import org.onosproject.incubator.net.l2monitoring.cfm.service.CfmConfigException;
+import org.onosproject.incubator.net.l2monitoring.cfm.service.CfmMdService;
+import org.onosproject.incubator.net.l2monitoring.cfm.service.CfmMepService;
+import org.slf4j.Logger;
+
+import static org.onosproject.cfm.cli.CfmMdListMdCommand.parseMaName;
+import static org.onosproject.cfm.cli.CfmMdListMdCommand.parseMdName;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Lists a particular Maintenance Domain.
+ */
+@Command(scope = "onos", name = "cfm-mep-list",
+        description = "Lists a filtered set of MEPs or all if no parameters specified.")
+public class CfmMepListCommand extends AbstractShellCommand {
+    private final Logger log = getLogger(getClass());
+    @Argument(index = 0, name = "md",
+            description = "Maintenance Domain name and type (in brackets) - will use all MDs if not specified",
+            required = false, multiValued = false)
+    String mdStr = null;
+    @Argument(index = 1, name = "ma",
+            description = "Maintenance Association name and type (in brackets) - requires MD",
+            required = false, multiValued = false)
+    String maStr = null;
+    @Argument(index = 2, name = "mep",
+            description = "MEP identifier - requires MD and MA",
+            required = false, multiValued = false)
+    String mepStr = null;
+
+    @Override
+    protected void execute() {
+        CfmMepService mepService = get(CfmMepService.class);
+        CfmMdService mdService = get(CfmMdService.class);
+
+        if (mdStr != null && !mdStr.isEmpty()) {
+
+
+            MdId mdId = parseMdName(mdStr);
+            print(printMdId(mdId));
+
+            if (maStr != null && !maStr.isEmpty()) {
+                MaIdShort maId = parseMaName(maStr);
+                print(printMaId(maId));
+
+                if (mepStr != null && !mepStr.isEmpty()) {
+                    MepId mepId = MepId.valueOf(Short.parseShort(mepStr));
+                    try {
+                        MepEntry mep = mepService.getMep(mdId, maId, mepId);
+                        if (mep != null) {
+                            print(printMepEntry(mep));
+                        }
+                    } catch (CfmConfigException e) {
+                        log.error("Error retrieving Mep details {}",
+                                new MepKeyId(mdId, maId, mepId), e);
+                    }
+
+                    //MD, MA and MEP given
+                } else {
+                    //MD and MA given but no MEP given
+                    try {
+                        mepService.getAllMeps(mdId, maId).forEach(mep -> {
+                            print(printMepEntry(mep));
+                        });
+                    } catch (CfmConfigException e) {
+                        log.error("Error retrieving Meps for {}/{}",
+                                mdId.mdName(), maId.maName(), e);
+                    }
+                }
+            } else {
+                //MD given but no MA given
+                mdService.getAllMaintenanceAssociation(mdId).forEach(ma -> {
+                    print(printMaId(ma.maId()));
+                    try {
+                        mepService.getAllMeps(mdId, ma.maId()).forEach(mep -> {
+                            print(printMepEntry(mep));
+                        });
+                    } catch (CfmConfigException e) {
+                        log.error("Error retrieving Meps for {}/{}",
+                                mdId.mdName(), ma.maId().maName(), e);
+                    }
+                });
+
+            }
+        } else {
+            mdService.getAllMaintenanceDomain().forEach(md -> {
+                print(printMdId(md.mdId()));
+
+                mdService.getAllMaintenanceAssociation(md.mdId()).forEach(ma -> {
+                    print(printMaId(ma.maId()));
+                    try {
+                        mepService.getAllMeps(md.mdId(), ma.maId()).forEach(mep -> {
+                            print(printMepEntry(mep));
+                        });
+                    } catch (CfmConfigException e) {
+                        log.error("Error retrieving Meps for {}/{}",
+                                md.mdId().mdName(), ma.maId().maName(), e);
+                    }
+                });
+            });
+        }
+    }
+
+    /**
+     * Print the whole MEP Entry (config and status).
+     * @param mep The MEPEntry to print
+     * @return A string with MepEntry details
+     */
+    public static String printMepEntry(MepEntry mep) {
+        StringBuffer sb = new StringBuffer("MEP: ");
+        sb.append(mep.mepId());
+        sb.append(" Device:" + mep.deviceId());
+        sb.append(", Port: " + mep.port());
+        sb.append(", Vlan: " + mep.primaryVid());
+        sb.append(", AdminSt: " + mep.administrativeState());
+        sb.append(", CciEnabled: " + mep.cciEnabled());
+        sb.append(", Priority: " + mep.ccmLtmPriority());
+        sb.append("\n"); //The following are state
+        sb.append(", Total CCMs: " + mep.totalCcmsTransmitted());
+        sb.append(", MAC: " + mep.macAddress());
+        sb.append(", Fault: " + mep.fngState());
+
+        mep.activeRemoteMepList().forEach(rmep -> {
+            sb.append("\n\tRmep: " + rmep.remoteMepId());
+            sb.append(", Mac: " + rmep.macAddress());
+            sb.append(", State: " + rmep.state());
+            sb.append(", Failed Time: " + rmep.failedOrOkTime());
+
+        });
+
+
+        return sb.toString();
+    }
+
+    public static String printMdId(MdId mdId) {
+        StringBuffer sb = new StringBuffer("MD: ");
+        sb.append(mdId.mdName());
+        sb.append("(" + mdId.nameType() + ")");
+        return sb.toString();
+    }
+
+    public static String printMaId(MaIdShort maId) {
+        StringBuffer sb = new StringBuffer("MA: ");
+        sb.append(maId.maName());
+        sb.append("(" + maId.nameType() + ")");
+        return sb.toString();
+    }
+
+}
diff --git a/apps/cfm/src/main/java/org/onosproject/cfm/cli/CfmMepListDeviceCommand.java b/apps/cfm/src/main/java/org/onosproject/cfm/cli/CfmMepListDeviceCommand.java
new file mode 100644
index 0000000..c99399a
--- /dev/null
+++ b/apps/cfm/src/main/java/org/onosproject/cfm/cli/CfmMepListDeviceCommand.java
@@ -0,0 +1,77 @@
+/*
+ * 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.cfm.cli;
+
+import org.apache.karaf.shell.commands.Argument;
+import org.apache.karaf.shell.commands.Command;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.incubator.net.l2monitoring.cfm.Mep;
+import org.onosproject.incubator.net.l2monitoring.cfm.service.CfmConfigException;
+import org.onosproject.incubator.net.l2monitoring.cfm.service.CfmMepService;
+import org.onosproject.net.DeviceId;
+import org.slf4j.Logger;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Lists all the MEPs on a particular device.
+ */
+@Command(scope = "onos", name = "cfm-mep-device-list",
+        description = "Lists a set of MEPs filtered by device.")
+public class CfmMepListDeviceCommand extends AbstractShellCommand {
+    private final Logger log = getLogger(getClass());
+    @Argument(index = 0, name = "device",
+            description = "Device Id",
+            required = true, multiValued = false)
+    String deviceStr = null;
+
+    @Override
+    protected void execute() {
+        CfmMepService mepService = get(CfmMepService.class);
+        if (deviceStr != null) {
+            DeviceId deviceId = DeviceId.deviceId(deviceStr);
+            try {
+                mepService.getAllMepsByDevice(deviceId).forEach(mep -> {
+                    print(printMep(mep));
+                });
+            } catch (CfmConfigException e) {
+                log.error("Error retrieving Meps for Device {}",
+                        deviceId, e);
+            }
+        }
+    }
+
+    /**
+     * Print only the config part of the MEP.
+     * @param mep The MEP to print
+     * @return A string with MD name, MA name and Mep details
+     */
+    public static String printMep(Mep mep) {
+        StringBuffer sb = new StringBuffer("MEP: ");
+        sb.append(mep.mdId().mdName() + "/");
+        sb.append(mep.maId().maName() + "/");
+        sb.append(mep.mepId());
+        sb.append(" Device:" + mep.deviceId());
+        sb.append(", Port: " + mep.port());
+        sb.append(", Vlan: " + mep.primaryVid());
+        sb.append(", AdminSt: " + mep.administrativeState());
+        sb.append(", CciEnabled: " + mep.cciEnabled());
+        sb.append(", Priority: " + mep.ccmLtmPriority());
+
+        return sb.toString();
+    }
+
+}
diff --git a/apps/cfm/src/main/java/org/onosproject/cfm/cli/completer/CfmDeviceIdCompleter.java b/apps/cfm/src/main/java/org/onosproject/cfm/cli/completer/CfmDeviceIdCompleter.java
new file mode 100644
index 0000000..6e2e29f
--- /dev/null
+++ b/apps/cfm/src/main/java/org/onosproject/cfm/cli/completer/CfmDeviceIdCompleter.java
@@ -0,0 +1,52 @@
+/*
+ * 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.cfm.cli.completer;
+
+import org.apache.karaf.shell.console.Completer;
+import org.apache.karaf.shell.console.completer.StringsCompleter;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.incubator.net.l2monitoring.cfm.service.CfmMepProgrammable;
+import org.onosproject.net.Device;
+import org.onosproject.net.device.DeviceService;
+
+import java.util.Iterator;
+import java.util.List;
+import java.util.SortedSet;
+
+/**
+ * CLI completer for Devices that support Meps.
+ */
+public class CfmDeviceIdCompleter implements Completer {
+    @Override
+    public int complete(String buffer, int cursor, List<String> candidates) {
+        // Delegate string completer
+        StringsCompleter delegate = new StringsCompleter();
+
+        // Fetch our service and feed it's offerings to the string completer
+        DeviceService service = AbstractShellCommand.get(DeviceService.class);
+        Iterator<Device> it = service.getDevices().iterator();
+        SortedSet<String> strings = delegate.getStrings();
+        while (it.hasNext()) {
+            Device device = it.next();
+            if (device.is(CfmMepProgrammable.class)) {
+                strings.add(device.id().toString());
+            }
+        }
+
+        // Now let the completer do the work for figuring out what to offer.
+        return delegate.complete(buffer, cursor, candidates);
+    }
+}
diff --git a/apps/cfm/src/main/java/org/onosproject/cfm/cli/completer/CfmMepIdCompleter.java b/apps/cfm/src/main/java/org/onosproject/cfm/cli/completer/CfmMepIdCompleter.java
new file mode 100644
index 0000000..6019916
--- /dev/null
+++ b/apps/cfm/src/main/java/org/onosproject/cfm/cli/completer/CfmMepIdCompleter.java
@@ -0,0 +1,81 @@
+/*
+ * 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.cfm.cli.completer;
+
+import org.onosproject.cli.AbstractChoicesCompleter;
+import org.onosproject.incubator.net.l2monitoring.cfm.service.CfmConfigException;
+import org.onosproject.incubator.net.l2monitoring.cfm.service.CfmMdService;
+import org.onosproject.incubator.net.l2monitoring.cfm.service.CfmMepService;
+import org.slf4j.Logger;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.onosproject.cli.AbstractShellCommand.get;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * CLI completer for Mep Id creation.
+ */
+public class CfmMepIdCompleter extends AbstractChoicesCompleter {
+    private final Logger log = getLogger(getClass());
+
+    @Override
+    public List<String> choices() {
+        List<String> choices = new ArrayList<>();
+
+        CfmMdService mdService = get(CfmMdService.class);
+        CfmMepService mepService = get(CfmMepService.class);
+
+        mdService.getAllMaintenanceDomain().forEach(md -> {
+            choices.add(new StringBuilder(md.mdId().mdName())
+                            .append("(")
+                            .append(md.mdId().nameType())
+                            .append(")").toString());
+
+            md.maintenanceAssociationList().forEach(ma -> {
+                    choices.add(new StringBuilder(md.mdId().mdName())
+                            .append("(")
+                            .append(md.mdId().nameType())
+                            .append(") ")
+                            .append(ma.maId().maName())
+                            .append("(")
+                            .append(ma.maId().nameType())
+                            .append(")").toString());
+
+                    try {
+                        mepService.getAllMeps(md.mdId(), ma.maId()).forEach(mep ->
+                                choices.add(new StringBuilder(md.mdId().mdName())
+                                        .append("(")
+                                        .append(md.mdId().nameType())
+                                        .append(") ")
+                                        .append(ma.maId().maName())
+                                        .append("(")
+                                        .append(ma.maId().nameType())
+                                        .append(") ")
+                                        .append(mep.mepId()).toString())
+                        );
+                    } catch (CfmConfigException e) {
+                        log.warn("Unable to retrieve mep details", e);
+                    }
+                }
+            );
+        });
+
+        return choices;
+    }
+
+}
diff --git a/apps/cfm/src/main/java/org/onosproject/cfm/rest/CfmWebApplication.java b/apps/cfm/src/main/java/org/onosproject/cfm/rest/CfmWebApplication.java
index 13157f2..b32174e 100644
--- a/apps/cfm/src/main/java/org/onosproject/cfm/rest/CfmWebApplication.java
+++ b/apps/cfm/src/main/java/org/onosproject/cfm/rest/CfmWebApplication.java
@@ -32,6 +32,7 @@
                 MdWebResource.class,
                 MaWebResource.class,
                 MepWebResource.class,
+                DeviceMepWebResource.class,
                 DmWebResource.class,
                 LmWebResource.class);
     }
diff --git a/apps/cfm/src/main/java/org/onosproject/cfm/rest/DeviceMepWebResource.java b/apps/cfm/src/main/java/org/onosproject/cfm/rest/DeviceMepWebResource.java
new file mode 100644
index 0000000..5fbed6d
--- /dev/null
+++ b/apps/cfm/src/main/java/org/onosproject/cfm/rest/DeviceMepWebResource.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2017-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.cfm.rest;
+
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import org.onosproject.incubator.net.l2monitoring.cfm.Mep;
+import org.onosproject.incubator.net.l2monitoring.cfm.service.CfmConfigException;
+import org.onosproject.incubator.net.l2monitoring.cfm.service.CfmMepService;
+import org.onosproject.net.DeviceId;
+import org.onosproject.rest.AbstractWebResource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.ws.rs.Consumes;
+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 java.util.Collection;
+
+/**
+ * Layer 2 CFM Maintenance Association Endpoint (MEP) by Device web resource.
+ */
+@Path("device")
+public class DeviceMepWebResource extends AbstractWebResource {
+
+    private final Logger log = LoggerFactory.getLogger(getClass());
+
+    /**
+     * Get all MEPs by Device Id. The device should support Meps
+     *
+     * @param deviceId The id of a device.
+     * @return 200 OK with a list of MEPS or 500 on error
+     */
+    @GET
+    @Path("{device_id}")
+    @Produces(MediaType.APPLICATION_JSON)
+    @Consumes(MediaType.APPLICATION_JSON)
+    public Response getAllMepsForDevice(@PathParam("device_id") String deviceId) {
+        DeviceId deviceIdObj = DeviceId.deviceId(deviceId);
+        log.debug("GET all Meps called for Device {}", deviceIdObj);
+        try {
+            Collection<Mep> mepCollection = get(CfmMepService.class)
+                    .getAllMepsByDevice(deviceIdObj);
+            ArrayNode an = mapper().createArrayNode();
+            an.add(codec(Mep.class).encode(mepCollection, this));
+            return ok(mapper().createObjectNode().set("meps", an)).build();
+        } catch (CfmConfigException e) {
+            log.error("Get all Meps on device {} failed because of exception",
+                    deviceIdObj, e);
+            return Response.serverError().entity("{ \"failure\":\"" + e.toString() + "\" }").build();
+        }
+    }
+}
diff --git a/apps/cfm/src/main/java/org/onosproject/cfm/rest/MdWebResource.java b/apps/cfm/src/main/java/org/onosproject/cfm/rest/MdWebResource.java
index c642f4a..0e523a7 100644
--- a/apps/cfm/src/main/java/org/onosproject/cfm/rest/MdWebResource.java
+++ b/apps/cfm/src/main/java/org/onosproject/cfm/rest/MdWebResource.java
@@ -82,6 +82,7 @@
         log.debug("GET called for MD {}", mdName);
         try {
             MaintenanceDomain md = get(CfmMdService.class)
+                    //FIXME Handle other types of name constructs e.g. DomainName
                     .getMaintenanceDomain(MdIdCharStr.asMdId(mdName))
                     .orElseThrow(() -> new IllegalArgumentException(
                             "MD " + mdName + " not Found"));
diff --git a/apps/cfm/src/main/java/org/onosproject/cfm/rest/MepWebResource.java b/apps/cfm/src/main/java/org/onosproject/cfm/rest/MepWebResource.java
index fa8c728..52d4150 100644
--- a/apps/cfm/src/main/java/org/onosproject/cfm/rest/MepWebResource.java
+++ b/apps/cfm/src/main/java/org/onosproject/cfm/rest/MepWebResource.java
@@ -18,6 +18,7 @@
 import java.io.InputStream;
 import java.net.URI;
 import java.util.Collection;
+import java.util.Optional;
 
 import javax.ws.rs.Consumes;
 import javax.ws.rs.DELETE;
@@ -145,7 +146,7 @@
             MdId mdId = MdIdCharStr.asMdId(mdName);
             MaIdShort maId = MaIdCharStr.asMaId(maName);
             boolean deleted = get(CfmMepService.class)
-                    .deleteMep(mdId, maId, MepId.valueOf(mepIdShort));
+                    .deleteMep(mdId, maId, MepId.valueOf(mepIdShort), Optional.empty());
             if (!deleted) {
                 return Response.notModified(mdName + "/" + maName + "/" +
                         mepIdShort + " did not exist").build();
@@ -187,8 +188,8 @@
 
             Mep mep = ((MepCodec) mepCodec).decode((ObjectNode) cfg, this, mdName, maName);
 
-            Boolean issuccess = get(CfmMepService.class).createMep(mdId, maId, mep);
-            if (!issuccess) {
+            Boolean didNotExist = get(CfmMepService.class).createMep(mdId, maId, mep);
+            if (!didNotExist) {
                 return Response.notModified(mdName + "/" + ma.maId() + "/" + mep.mepId() +
                         " already exists").build();
             }
diff --git a/apps/cfm/src/main/java/org/onosproject/cfm/web/MaintenanceAssociationCodec.java b/apps/cfm/src/main/java/org/onosproject/cfm/web/MaintenanceAssociationCodec.java
index 62be35d..6c3829f 100644
--- a/apps/cfm/src/main/java/org/onosproject/cfm/web/MaintenanceAssociationCodec.java
+++ b/apps/cfm/src/main/java/org/onosproject/cfm/web/MaintenanceAssociationCodec.java
@@ -124,10 +124,13 @@
                 builder = builder.addToComponentList(component);
             }
 
-            List<MepId> remoteMeps = (new RMepCodec()).decode(
-                    (ArrayNode) nullIsIllegal(maNode.get(RMEP_LIST), "rmep-list is required"), context);
-            for (MepId remoteMep:remoteMeps) {
-                builder = builder.addToRemoteMepIdList(remoteMep);
+            JsonNode rmepListJson = maNode.get(RMEP_LIST);
+            if (rmepListJson != null) {
+                List<MepId> remoteMeps = (new RMepCodec()).decode(
+                        (ArrayNode) rmepListJson, context);
+                for (MepId remoteMep:remoteMeps) {
+                    builder = builder.addToRemoteMepIdList(remoteMep);
+                }
             }
 
             return builder.build();