1 files changed, 113 insertions, 0 deletions
diff --git a/gui-pdp-monitoring/src/main/java/org/onap/policy/gui/pdp/monitoring/PdpMonitoringServerParameterParser.java b/gui-pdp-monitoring/src/main/java/org/onap/policy/gui/pdp/monitoring/PdpMonitoringServerParameterParser.java
new file mode 100644
index 0000000..5d9d290
--- /dev/null
+++ b/gui-pdp-monitoring/src/main/java/org/onap/policy/gui/pdp/monitoring/PdpMonitoringServerParameterParser.java
@@ -0,0 +1,113 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 Nordix 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.gui.pdp.monitoring;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.util.Arrays;
+import org.apache.commons.cli.CommandLine;
+import org.apache.commons.cli.DefaultParser;
+import org.apache.commons.cli.HelpFormatter;
+import org.apache.commons.cli.Option;
+import org.apache.commons.cli.Options;
+import org.apache.commons.cli.ParseException;
+
+/**
+ * This class reads and handles command line parameters to the Pdp Statistics services.
+ *
+ * @author Yehui Wang (yehui.wang@est.tech)
+ */
+public class PdpMonitoringServerParameterParser {
+    // Apache Commons CLI options
+    private final Options options;
+
+    /**
+     * Construct the options for the Pdp monitoring services.
+     */
+    public PdpMonitoringServerParameterParser() {
+        options = new Options();
+        options.addOption("h", "help", false, "outputs the usage of this command");
+        options.addOption(Option.builder("p").longOpt("port").desc("port to use for the Pdp Services REST calls")
+                .hasArg().argName("PORT").required(false).type(Number.class).build());
+        options.addOption(Option.builder("t").longOpt("time-to-live")
+                .desc("the amount of time in seconds that the server will run for before terminating").hasArg()
+                .argName("TIME_TO_LIVE").required(false).type(Number.class).build());
+    }
+
+    /**
+     * Parse the command line options.
+     *
+     * @param args the arguments
+     * @return parsed parameters
+     */
+    public PdpMonitoringServerParameters parse(final String[] args) {
+        CommandLine commandLine = null;
+        try {
+            commandLine = new DefaultParser().parse(options, args);
+        } catch (final ParseException e) {
+            throw new PdpMonitoringServerParameterException("invalid command line arguments specified", e);
+        }
+
+        final PdpMonitoringServerParameters parameters = new PdpMonitoringServerParameters();
+        final String[] remainingArgs = commandLine.getArgs();
+
+        if (commandLine.getArgs().length > 0) {
+            throw new PdpMonitoringServerParameterException(
+                    "too many command line arguments specified : " + Arrays.toString(remainingArgs));
+        }
+
+        if (commandLine.hasOption('h')) {
+            parameters.setHelpSet(true);
+        }
+        try {
+            if (commandLine.hasOption('p')) {
+                parameters.setPort(((Number) commandLine.getParsedOptionValue("port")).intValue());
+            }
+        } catch (final ParseException e) {
+            throw new PdpMonitoringServerParameterException("error parsing argument \"port\"", e);
+        }
+        try {
+            if (commandLine.hasOption('t')) {
+                parameters.setTimeToLive(((Number) commandLine.getParsedOptionValue("time-to-live")).longValue());
+            }
+        } catch (final ParseException e) {
+            throw new PdpMonitoringServerParameterException("error parsing argument \"time-to-live\"", e);
+        }
+
+        return parameters;
+    }
+
+    /**
+     * Get help information.
+     *
+     * @param mainClassName the main class name for the help output
+     * @return help string
+     */
+    public String getHelp(final String mainClassName) {
+        final StringWriter stringWriter = new StringWriter();
+        final PrintWriter stringPrintWriter = new PrintWriter(stringWriter);
+
+        final HelpFormatter helpFormatter = new HelpFormatter();
+        helpFormatter.printHelp(stringPrintWriter, 120, mainClassName + " [options...] ", "", options, 0, 0, "");
+
+        return stringWriter.toString();
+    }
+}