[ONOS-6594] Upgrade to Atomix 2.0.0

Change-Id: I6534bca1c8570b4e017f682953b876da29146675
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/resources/impl/AtomixWorkQueueOperations.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/resources/impl/AtomixWorkQueueOperations.java
new file mode 100644
index 0000000..a7a0df1
--- /dev/null
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/resources/impl/AtomixWorkQueueOperations.java
@@ -0,0 +1,148 @@
+/*
+ * Copyright 2016-present 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.store.primitives.resources.impl;
+
+import java.util.Collection;
+
+import com.google.common.base.MoreObjects;
+import io.atomix.protocols.raft.operation.OperationId;
+import io.atomix.protocols.raft.operation.OperationType;
+import org.onlab.util.KryoNamespace;
+import org.onosproject.store.serializers.KryoNamespaces;
+import org.onosproject.store.service.Task;
+import org.onosproject.store.service.WorkQueueStats;
+
+/**
+ * {@link AtomixWorkQueue} resource state machine operations.
+ */
+public enum AtomixWorkQueueOperations implements OperationId {
+    STATS("stats", OperationType.QUERY),
+    REGISTER("register", OperationType.COMMAND),
+    UNREGISTER("unregister", OperationType.COMMAND),
+    ADD("add", OperationType.COMMAND),
+    TAKE("take", OperationType.COMMAND),
+    COMPLETE("complete", OperationType.COMMAND),
+    CLEAR("clear", OperationType.COMMAND);
+
+    private final String id;
+    private final OperationType type;
+
+    AtomixWorkQueueOperations(String id, OperationType type) {
+        this.id = id;
+        this.type = type;
+    }
+
+    @Override
+    public String id() {
+        return id;
+    }
+
+    @Override
+    public OperationType type() {
+        return type;
+    }
+
+    public static final KryoNamespace NAMESPACE = KryoNamespace.newBuilder()
+            .register(KryoNamespaces.BASIC)
+            .nextId(KryoNamespaces.BEGIN_USER_CUSTOM_ID)
+            .register(Add.class)
+            .register(Take.class)
+            .register(Complete.class)
+            .register(Task.class)
+            .register(WorkQueueStats.class)
+            .build("AtomixWorkQueueOperations");
+
+    /**
+     * Work queue operation.
+     */
+    public abstract static class WorkQueueOperation {
+    }
+
+    /**
+     * Command to add a collection of tasks to the queue.
+     */
+    @SuppressWarnings("serial")
+    public static class Add extends WorkQueueOperation {
+        private Collection<byte[]> items;
+
+        private Add() {
+        }
+
+        public Add(Collection<byte[]> items) {
+            this.items = items;
+        }
+
+        public Collection<byte[]> items() {
+            return items;
+        }
+
+        @Override
+        public String toString() {
+            return MoreObjects.toStringHelper(getClass())
+                    .add("items", items)
+                    .toString();
+        }
+    }
+
+    /**
+     * Command to take a task from the queue.
+     */
+    @SuppressWarnings("serial")
+    public static class Take extends WorkQueueOperation {
+        private int maxTasks;
+
+        private Take() {
+        }
+
+        public Take(int maxTasks) {
+            this.maxTasks = maxTasks;
+        }
+
+        public int maxTasks() {
+            return maxTasks;
+        }
+
+        @Override
+        public String toString() {
+            return MoreObjects.toStringHelper(getClass())
+                    .add("maxTasks", maxTasks)
+                    .toString();
+        }
+    }
+
+    @SuppressWarnings("serial")
+    public static class Complete extends WorkQueueOperation {
+        private Collection<String> taskIds;
+
+        private Complete() {
+        }
+
+        public Complete(Collection<String> taskIds) {
+            this.taskIds = taskIds;
+        }
+
+        public Collection<String> taskIds() {
+            return taskIds;
+        }
+
+        @Override
+        public String toString() {
+            return MoreObjects.toStringHelper(getClass())
+                    .add("taskIds", taskIds)
+                    .toString();
+        }
+    }
+}
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