(chore) commandline option for printing current memory stats for debugging

src/main/java/de/kosit/validationtool/cmd/CommandLineApplication.java

@@ -31,7 +31,13 @@ import java.util.Collections;
 import java.util.List;
 import java.util.stream.Collectors;
 
-import org.apache.commons.cli.*;
+import org.apache.commons.cli.CommandLine;
+import org.apache.commons.cli.CommandLineParser;
+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;
 import org.apache.commons.lang3.StringUtils;
 
 import lombok.extern.slf4j.Slf4j;
@@ -72,6 +78,8 @@ public class CommandLineApplication {
     private static final Option CHECK_ASSERTIONS = Option.builder("c").longOpt("check-assertions").hasArg()
             .desc("Check the result using defined assertions").argName("assertions-file").build();
 
+    private static final Option PRINT_MEM_STATS = Option.builder("m").longOpt("memory-stats").desc("Prints some memory stats").build();
+
     private CommandLineApplication() {
         // main class -> hide constructor
     }
@@ -146,6 +154,9 @@ public class CommandLineApplication {
                 Assertions assertions = loadAssertions(cmd.getOptionValue(CHECK_ASSERTIONS.getOpt()));
                 check.getCheckSteps().add(new CheckAssertionAction(assertions, ObjectFactory.createProcessor()));
             }
+            if (cmd.hasOption(PRINT_MEM_STATS.getOpt())) {
+                check.getCheckSteps().add(new PrintMemoryStats());
+            }
 
             log.info("Setup completed in {}ms\n", System.currentTimeMillis() - start);
 
@@ -285,6 +296,7 @@ public class CommandLineApplication {
         options.addOption(EXTRACT_HTML);
         options.addOption(DEBUG);
         options.addOption(CHECK_ASSERTIONS);
+        options.addOption(PRINT_MEM_STATS);
         return options;
     }
 }

src/main/java/de/kosit/validationtool/cmd/PrintMemoryStats.java

@@ -0,0 +1,48 @@
+/*
+ * Licensed to the Koordinierungsstelle für IT-Standards (KoSIT) under
+ * one or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  KoSIT licenses this file
+ * to you 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 de.kosit.validationtool.cmd;
+
+import java.text.NumberFormat;
+
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * @author Andreas Penski
+ */
+@Slf4j
+public class PrintMemoryStats implements de.kosit.validationtool.impl.tasks.CheckAction {
+
+    @Override
+    public void check(final Bag results) {
+        Runtime.getRuntime().gc();
+        final Runtime runtime = Runtime.getRuntime();
+        StringBuilder sb = new StringBuilder();
+        long maxMemory = runtime.maxMemory();
+        long allocatedMemory = runtime.totalMemory();
+        long freeMemory = runtime.freeMemory();
+        NumberFormat format = NumberFormat.getInstance();
+
+        sb.append("free memory: " + format.format(freeMemory / 1024));
+        sb.append("MB allocated memory: " + format.format(allocatedMemory / 1024));
+        sb.append("MB max memory: " + format.format(maxMemory / 1024));
+        sb.append("MB total free memory: " + format.format((freeMemory + (maxMemory - allocatedMemory)) / 1024) + "MB");
+        log.info("{}", sb.toString());
+    }
+}