[ONOS-4136] Implement Partitions View.
show partition info in table format
Change-Id: I5df276ab092715249f97ff118d0012da09789f49
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/PartitionViewMessageHandler.java b/web/gui/src/main/java/org/onosproject/ui/impl/PartitionViewMessageHandler.java
new file mode 100644
index 0000000..7633c2a
--- /dev/null
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/PartitionViewMessageHandler.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2017-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.ui.impl;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.google.common.collect.ImmutableSet;
+import org.onosproject.store.primitives.PartitionAdminService;
+import org.onosproject.store.service.PartitionInfo;
+import org.onosproject.ui.RequestHandler;
+import org.onosproject.ui.UiMessageHandler;
+import org.onosproject.ui.table.CellFormatter;
+import org.onosproject.ui.table.TableModel;
+import org.onosproject.ui.table.TableRequestHandler;
+
+import java.util.Collection;
+import java.util.List;
+
+/**
+ * Message handler for partition view related messages.
+ */
+public class PartitionViewMessageHandler extends UiMessageHandler {
+ private static final String PARTITION_DATA_REQ = "partitionDataRequest";
+ private static final String PARTITION_DATA_RESP = "partitionDataResponse";
+ private static final String PARTITIONS = "partitions";
+
+ private static final String NAME = "name";
+ private static final String TERM = "term";
+ private static final String LEADER = "leader";
+ private static final String MEMBERS = "members";
+
+ private static final String[] COL_IDS = {NAME, TERM, LEADER, MEMBERS};
+
+ @Override
+ protected Collection<RequestHandler> createRequestHandlers() {
+ return ImmutableSet.of(new PartitionDataHandler());
+ }
+
+ private final class PartitionDataHandler extends TableRequestHandler {
+ private static final String NO_ROWS_MESSAGE = "No partitions found";
+
+ private PartitionDataHandler() {
+ super(PARTITION_DATA_REQ, PARTITION_DATA_RESP, PARTITIONS);
+ }
+
+ @Override
+ protected String[] getColumnIds() {
+ return COL_IDS;
+ }
+
+ @Override
+ protected String noRowsMessage(ObjectNode payload) {
+ return NO_ROWS_MESSAGE;
+ }
+
+ @Override
+ protected String defaultColumnId() {
+ return NAME;
+ }
+
+ @Override
+ protected TableModel createTableModel() {
+ TableModel tm = super.createTableModel();
+ tm.setFormatter(MEMBERS, new MembersFormatter());
+ return tm;
+ }
+
+ @Override
+ protected void populateTable(TableModel tm, ObjectNode payload) {
+ PartitionAdminService ps = get(PartitionAdminService.class);
+ for (PartitionInfo partition : ps.partitionInfo()) {
+ populateRow(tm.addRow(), partition);
+ }
+ }
+
+ private void populateRow(TableModel.Row row, PartitionInfo p) {
+ row.cell(NAME, p.name())
+ .cell(TERM, p.term())
+ .cell(LEADER, p.leader())
+ .cell(MEMBERS, p.members());
+ }
+
+ private final class MembersFormatter implements CellFormatter {
+ private static final String COMMA = ", ";
+
+ @Override
+ public String format(Object value) {
+ List<String> members = (List<String>) value;
+ if (members.isEmpty()) {
+ return "(No members for this partition)";
+ }
+ StringBuilder sb = new StringBuilder();
+ for (String m : members) {
+ sb.append(m).append(COMMA);
+ }
+ removeTrailingComma(sb);
+
+ return sb.toString();
+ }
+
+ private StringBuilder removeTrailingComma(StringBuilder sb) {
+ int pos = sb.lastIndexOf(COMMA);
+ sb.delete(pos, sb.length());
+ return sb;
+ }
+ }
+ }
+}