Initial commit, work in progress

.gitattributes

@@ -0,0 +1,6 @@
+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# These are explicitly windows files and should use crlf
+*.bat           text eol=crlf
+

.gitignore

@@ -0,0 +1,6 @@
+# Ignore Gradle project-specific cache directory
+.gradle
+.idea
+
+# Ignore Gradle build output directory
+build

README.md

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+# System Monitor
+
+... or some better name.
+
+
+## Agent
+
+Runs on your host and collects metrics. Metrics are aggregated and sent to central *collector*.
+
+Metrics are currently processor, memory and disk usage statistics.
+
+
+## TODO: Collector
+
+Receives aggregated measurements from agents and saves metrics info InfluxDB.

agent/build.gradle

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+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This generated file contains a sample Java application project to get you started.
+ * For more details take a look at the 'Building Java & JVM projects' chapter in the Gradle
+ * User Manual available at https://docs.gradle.org/7.0/userguide/building_java_projects.html
+ */
+
+plugins {
+    id 'groovy'
+    id 'application'
+}
+
+repositories {
+    // Use Maven Central for resolving dependencies.
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation 'org.codehaus.groovy:groovy:3.0.7'
+    testImplementation 'org.spockframework:spock-core:2.0-M4-groovy-3.0'
+    testImplementation 'junit:junit:4.13.1'
+    testImplementation 'org.slf4j:slf4j-api:1.7.30'
+    testImplementation project(':shared')
+
+    implementation project(':shared')
+    implementation 'org.slf4j:slf4j-api:1.7.30'
+    implementation 'org.slf4j:slf4j-simple:1.7.30'
+
+    // https://mvnrepository.com/artifact/org.apache.camel/camel-core
+    implementation group: 'org.apache.camel', name: 'camel-core', version: '3.7.3'
+    implementation group: 'org.apache.camel', name: 'camel-main', version: '3.7.3'
+    implementation group: 'org.apache.camel', name: 'camel-bean', version: '3.7.3'
+    implementation group: 'org.apache.camel', name: 'camel-timer', version: '3.7.3'
+    implementation group: 'org.apache.camel', name: 'camel-stream', version: '3.7.3'
+
+}
+
+application {
+    // Define the main class for the application.
+    mainClass = 'org.sysmon.agent.Application'
+}
+
+tasks.named('test') {
+    // Use junit platform for unit tests.
+    useJUnitPlatform()
+}

agent/src/main/java/org/sysmon/agent/Application.java

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+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+package org.sysmon.agent;
+
+import org.apache.camel.main.Main;
+
+public class Application {
+
+    public static void main(String[] args) {
+
+        // use Camels Main class
+        Main main = new Main();
+
+        // and add the routes (you can specify multiple classes)
+        main.configure().addRoutesBuilder(MyRouteBuilder.class);
+
+        // now keep the application running until the JVM is terminated (ctrl + c or sigterm)
+        try {
+            main.run(args);
+        } catch(Exception e) {
+            System.err.println(e.getMessage());
+        }
+
+    }
+}

agent/src/main/java/org/sysmon/agent/MetricProcessor.java

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+package org.sysmon.agent;
+
+import org.apache.camel.Exchange;
+import org.apache.camel.Processor;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.sysmon.shared.MetricResult;
+
+public class MetricProcessor implements Processor {
+
+    private final static Logger log = LoggerFactory.getLogger(MetricProcessor.class);
+
+
+    public void process(Exchange exchange) throws Exception {
+
+        MetricResult payload = exchange.getIn().getBody(MetricResult.class);
+        log.info(payload.toString());
+
+        // do something with the payload and/or exchange here
+        //exchange.getIn().setBody("Changed body");
+
+        // do something...
+    }
+
+
+}

agent/src/main/java/org/sysmon/agent/MyRouteBuilder.java

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+package org.sysmon.agent;
+
+import org.apache.camel.builder.RouteBuilder;
+
+public class MyRouteBuilder extends RouteBuilder {
+    
+    @Override
+    public void configure() throws Exception {
+
+        // Setup metrics measurement beans
+        // TODO: Discover beans on classpath and setup accordingly
+        from("timer:collect?period=5000")
+            .bean("memoryBean", "getMetrics")
+            .to("seda:metrics");
+        from("timer:collect?period=5000")
+            .bean("processorBean", "getMetrics")
+            .to("seda:metrics");
+        from("timer:collect?period=5000")
+            .bean("diskBean", "getMetrics")
+            .to("seda:metrics");
+
+        // TODO: Somehow combine all results in a format suitable for sending to REST endpoint
+        from("seda:metrics").process("metricProcessor");
+
+        // Could we store the last n results from each bean, and send mean value to the REST endpoint?
+
+
+    }
+
+}
+

agent/src/main/java/org/sysmon/agent/beans/DiskBean.java

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+package org.sysmon.agent.beans;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.camel.spi.Configurer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.sysmon.shared.MetricBean;
+import org.sysmon.shared.MetricMeasurement;
+import org.sysmon.shared.MetricResult;
+
+@Configurer
+public class DiskBean implements MetricBean {
+
+    private final static Logger log = LoggerFactory.getLogger(DiskBean.class);
+
+    private List<LinuxDiskStat> currentDiskStats;
+    private List<LinuxDiskStat> previousDiskStats;
+
+
+    @Override
+    public MetricResult getMetrics() {
+
+        MetricResult result = new MetricResult("disk");
+        try {
+            copyCurrentValues();
+            readProcFile();
+            result.setMeasurementList(calculate());
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return result;
+    }
+
+
+
+    private void readProcFile() throws IOException {
+
+        currentDiskStats = new ArrayList<>();
+        List<String> allLines = Files.readAllLines(Paths.get("/proc/diskstats"), StandardCharsets.UTF_8);
+        for(String line : allLines) {
+            currentDiskStats.add(new LinuxDiskStat(line));
+        }
+
+    }
+
+
+    private void copyCurrentValues() {
+
+        if(currentDiskStats != null && currentDiskStats.size() > 0) {
+            previousDiskStats = new ArrayList<>(currentDiskStats);
+        }
+
+    }
+
+
+    private List<MetricMeasurement> calculate() {
+
+        List<MetricMeasurement> measurementList = new ArrayList<>();
+
+        if(previousDiskStats == null || previousDiskStats.size() != currentDiskStats.size()) {
+            return measurementList;
+        }
+
+
+        for(int i = 0; i < currentDiskStats.size(); i++) {
+
+            LinuxDiskStat curStat = currentDiskStats.get(i);
+            LinuxDiskStat preStat = previousDiskStats.get(i);
+
+            if(curStat.device.startsWith("loop")) {
+                continue;
+            }
+
+            // TODO: Calculate differences for wanted disk io stats
+            measurementList.add(new MetricMeasurement(curStat.getDevice(), 0));
+
+        }
+
+        return measurementList;
+    }
+
+
+    public static class LinuxDiskStat {
+    /*
+        ==  ===================================
+         1  major number
+		 2  minor mumber
+		 3  device name
+		 4  reads completed successfully
+		 5  reads merged
+		 6  sectors read
+		 7  time spent reading (ms)
+		 8  writes completed
+		 9  writes merged
+		10  sectors written
+		11  time spent writing (ms)
+		12  I/Os currently in progress
+		13  time spent doing I/Os (ms)
+		14  weighted time spent doing I/Os (ms)
+		==  ===================================
+
+    Kernel 4.18+ appends four more fields for discard
+    tracking putting the total at 18:
+
+        ==  ===================================
+        15  discards completed successfully
+		16  discards merged
+		17  sectors discarded
+		18  time spent discarding
+		==  ===================================
+
+    Kernel 5.5+ appends two more fields for flush requests:
+
+        ==  =====================================
+        19  flush requests completed successfully
+		20  time spent flushing
+		==  =====================================
+    */
+
+        private final int major;
+        private final int minor;
+        private final String device;                // device name
+        private final Long readsCompleted;          // successfully
+        private final Long readsMerged;
+        private final Long sectorsRead;             // 512 bytes pr. sector
+        private final Long timeSpentReading;        // ms
+        private final Long writesCompleted;         // successfully
+        private final Long writesMerged;
+        private final Long sectorsWritten;          // 512 bytes pr. sector
+        private final Long timeSpentWriting;        // ms
+        private final Long ioInProgress;
+        private final Long timeSpentOnIo;           // ms
+        private final Long timeSpentOnIoWeighted;
+
+        private final Long discardsCompleted;       // successfully
+        private final Long discardsMerged;
+        private final Long sectorsDiscarded;        // 512 bytes pr. sector
+        private final Long timeSpentDiscarding;     // ms
+
+        private final Long flushRequestsCompleted;
+        private final Long timeSpentFlushing;       // ms
+
+
+        LinuxDiskStat(String procString) {
+
+            String[] splitStr = procString.trim().split("\\s+");
+            if(splitStr.length < 14) {
+                throw new UnsupportedOperationException("Linux proc DISK string error: " + procString);
+            }
+
+            this.major = Integer.parseInt(splitStr[0]);
+            this.minor = Integer.parseInt(splitStr[1]);
+            this.device = splitStr[2];
+            this.readsCompleted = Long.parseLong(splitStr[3]);
+            this.readsMerged = Long.parseLong(splitStr[4]);
+            this.sectorsRead = Long.parseLong(splitStr[5]);
+            this.timeSpentReading = Long.parseLong(splitStr[6]);
+            this.writesCompleted = Long.parseLong(splitStr[7]);
+            this.writesMerged = Long.parseLong(splitStr[8]);
+            this.sectorsWritten = Long.parseLong(splitStr[9]);
+            this.timeSpentWriting = Long.parseLong(splitStr[10]);
+            this.ioInProgress = Long.parseLong(splitStr[11]);
+            this.timeSpentOnIo = Long.parseLong(splitStr[12]);
+            this.timeSpentOnIoWeighted = Long.parseLong(splitStr[13]);
+
+            if(splitStr.length >= 18) {
+                this.discardsCompleted = Long.parseLong(splitStr[10]);
+                this.discardsMerged = Long.parseLong(splitStr[11]);
+                this.sectorsDiscarded = Long.parseLong(splitStr[12]);
+                this.timeSpentDiscarding = Long.parseLong(splitStr[13]);
+            } else {
+                this.discardsCompleted = null;
+                this.discardsMerged = null;
+                this.sectorsDiscarded = null;
+                this.timeSpentDiscarding = null;
+            }
+
+            if(splitStr.length == 20) {
+                this.flushRequestsCompleted = Long.parseLong(splitStr[14]);
+                this.timeSpentFlushing = Long.parseLong(splitStr[15]);
+            } else {
+                this.flushRequestsCompleted = null;
+                this.timeSpentFlushing = null;
+            }
+
+        }
+
+        public String getDevice() {
+            return device;
+        }
+
+
+    }
+
+}
+
+

agent/src/main/java/org/sysmon/agent/beans/MemoryBean.java

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+package org.sysmon.agent.beans;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.apache.camel.spi.Configurer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.sysmon.shared.MetricBean;
+import org.sysmon.shared.MetricMeasurement;
+import org.sysmon.shared.MetricResult;
+
+@Configurer
+public class MemoryBean implements MetricBean {
+
+    private final static Logger log = LoggerFactory.getLogger(MemoryBean.class);
+    private final Pattern pattern = Pattern.compile("^([a-zA-Z]+):\\s+(\\d+)\\s+");
+
+
+    @Override
+    public MetricResult getMetrics() {
+        
+        MetricResult result = new MetricResult("memory");
+        try {
+            result.setMeasurementList(readProcFile());
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return result;
+    }
+
+
+
+    private List<MetricMeasurement> readProcFile() throws IOException {
+
+        List<MetricMeasurement> measurementList = new ArrayList<>();
+
+        List<String> allLines = Files.readAllLines(Paths.get("/proc/meminfo"), StandardCharsets.UTF_8);
+        for(String line : allLines) {
+
+            if(line.startsWith("Mem")) {
+                Matcher matcher = pattern.matcher(line);
+                if(matcher.find() && matcher.groupCount() == 2) {
+                    measurementList.add(new MetricMeasurement(matcher.group(1), matcher.group(2)));
+                }
+            }
+        }
+
+        return measurementList;
+    }
+
+}

agent/src/main/java/org/sysmon/agent/beans/ProcessorBean.java

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+package org.sysmon.agent.beans;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.camel.spi.Configurer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.sysmon.shared.MetricBean;
+import org.sysmon.shared.MetricMeasurement;
+import org.sysmon.shared.MetricResult;
+
+@Configurer
+public class ProcessorBean implements MetricBean {
+
+    private final static Logger log = LoggerFactory.getLogger(ProcessorBean.class);
+
+    private List<LinuxProcessorStat> currentProcessorStats;
+    private List<LinuxProcessorStat> previousProcessorStats;
+
+
+    @Override
+    public MetricResult getMetrics() {
+
+        MetricResult result = new MetricResult("processor");
+        try {
+            copyCurrentValues();
+            readProcFile();
+            result.setMeasurementList(calculate());
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return result;
+    }
+
+
+    private void readProcFile() throws IOException {
+
+        currentProcessorStats = new ArrayList<>();
+        List<String> allLines = Files.readAllLines(Paths.get("/proc/stat"), StandardCharsets.UTF_8);
+        for(String line : allLines) {
+            if(line.startsWith("cpu")) {
+                log.debug(line);
+                currentProcessorStats.add(new LinuxProcessorStat(line));
+            }
+        }
+
+    }
+
+
+    private void copyCurrentValues() {
+
+        if(currentProcessorStats != null && currentProcessorStats.size() > 0) {
+            previousProcessorStats = new ArrayList<>(currentProcessorStats);
+        }
+
+    }
+
+
+    private List<MetricMeasurement> calculate() {
+
+        List<MetricMeasurement> measurementList = new ArrayList<>();
+
+        if(previousProcessorStats == null || previousProcessorStats.size() != currentProcessorStats.size()) {
+            return measurementList;
+        }
+
+        for(int i = 0; i < currentProcessorStats.size(); i++) {
+
+            LinuxProcessorStat curStat = currentProcessorStats.get(i);
+            LinuxProcessorStat preStat = previousProcessorStats.get(i);
+
+            long workTimeDiff = curStat.getCombinedTime() - preStat.getCombinedTime();
+            long idleTimeDiff = curStat.getCombinedIdleTime() - preStat.getCombinedIdleTime();
+            float percentUsage = (float) (workTimeDiff - idleTimeDiff) / workTimeDiff;
+
+            Integer pct = (int) (percentUsage * 100);
+            measurementList.add(new MetricMeasurement(curStat.getCpuName(), pct));
+
+        }
+
+        return  measurementList;
+
+    }
+
+
+    public static class LinuxProcessorStat {
+
+        private final String cpuName;
+        private final Long userTime;
+        private final Long niceTime;
+        private final Long systemTime;
+        private final Long idleTime;
+        private final Long ioWaitTime;
+        private final Long irqTime;
+        private final Long softIrqTime;
+        private final Long stealTime;
+        private final Long guestTime;
+        private final Long guestNiceTime;
+
+
+        LinuxProcessorStat(String procString) {
+
+            String[] splitStr = procString.trim().split("\\s+");
+            if(splitStr.length != 11) {
+                throw new UnsupportedOperationException("Linux proc CPU string error: " + procString);
+            }
+
+            this.cpuName = splitStr[0];
+            this.userTime = Long.parseLong(splitStr[1]);
+            this.niceTime = Long.parseLong(splitStr[2]);
+            this.systemTime = Long.parseLong(splitStr[3]);
+            this.idleTime = Long.parseLong(splitStr[4]);
+            this.ioWaitTime = Long.parseLong(splitStr[5]);
+            this.irqTime = Long.parseLong(splitStr[6]);
+            this.softIrqTime = Long.parseLong(splitStr[7]);
+            this.stealTime = Long.parseLong(splitStr[8]);
+            this.guestTime = Long.parseLong(splitStr[9]);
+            this.guestNiceTime = Long.parseLong(splitStr[10]);
+
+        }
+
+        public String getCpuName() {
+            return cpuName;
+        }
+
+        public Long getUserTime() {
+            return userTime;
+        }
+
+        public Long getNiceTime() {
+            return niceTime;
+        }
+
+        public Long getSystemTime() {
+            return systemTime;
+        }
+
+        public Long getIdleTime() {
+            return idleTime;
+        }
+
+        public Long getIoWaitTime() {
+            return ioWaitTime;
+        }
+
+        public Long getIrqTime() {
+            return irqTime;
+        }
+
+        public Long getSoftIrqTime() {
+            return softIrqTime;
+        }
+
+        public Long getStealTime() {
+            return stealTime;
+        }
+
+        public Long getGuestTime() {
+            return guestTime;
+        }
+
+        public Long getGuestNiceTime() {
+            return guestNiceTime;
+        }
+
+        public Long getCombinedIdleTime() {
+            return idleTime + ioWaitTime;
+        }
+
+        public Long getCombinedWorkTime() {
+            return userTime + niceTime + systemTime + irqTime + softIrqTime + stealTime + guestTime + guestNiceTime;
+        }
+
+        public Long getCombinedTime() {
+            return getCombinedIdleTime() + getCombinedWorkTime();
+        }
+
+    }
+
+}
+
+

agent/src/main/resources/application.properties

@@ -0,0 +1,45 @@
+## ---------------------------------------------------------------------------
+## Licensed to the Apache Software Foundation (ASF) under one or more
+## contributor license agreements.  See the NOTICE file distributed with
+## this work for additional information regarding copyright ownership.
+## The ASF 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.
+## ---------------------------------------------------------------------------
+
+# to configure camel main
+# here you can configure options on camel main (see MainConfigurationProperties class)
+camel.main.name = SysMonAgent
+
+# enable tracing
+### camel.main.tracing = true
+
+# bean introspection to log reflection based configuration
+camel.main.beanIntrospectionExtendedStatistics=true
+camel.main.beanIntrospectionLoggingLevel=INFO
+
+# run in lightweight mode to be tiny as possible
+camel.main.lightweight = true
+# and eager load classes
+#camel.main.eager-classloading = true
+
+# use object pooling to reduce JVM garbage collection
+#camel.main.exchange-factory = pooled
+#camel.main.exchange-factory-statistics-enabled = true
+
+# can be used to not start the route
+# camel.main.auto-startup = false
+
+# configure beans
+camel.beans.metricProcessor = #class:org.sysmon.agent.MetricProcessor
+camel.beans.diskBean = #class:org.sysmon.agent.beans.DiskBean
+camel.beans.memoryBean = #class:org.sysmon.agent.beans.MemoryBean
+camel.beans.processorBean = #class:org.sysmon.agent.beans.ProcessorBean

agent/src/test/groovy/org/sysmon/test/AppTest.groovy

@@ -0,0 +1,12 @@
+/*
+ * This Spock specification was generated by the Gradle 'init' task.
+ */
+package org.sysmon.test
+
+import spock.lang.Specification
+
+class AppTest extends Specification {
+
+   
+
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# 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
+#
+#      https://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.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1,11 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * The settings file is used to specify which projects to include in your build.
+ *
+ * Detailed information about configuring a multi-project build in Gradle can be found
+ * in the user manual at https://docs.gradle.org/7.0/userguide/multi_project_builds.html
+ */
+
+rootProject.name = 'sysmon'
+include('shared', 'agent')

shared/build.gradle

@@ -0,0 +1,33 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This generated file contains a sample Java application project to get you started.
+ * For more details take a look at the 'Building Java & JVM projects' chapter in the Gradle
+ * User Manual available at https://docs.gradle.org/7.0/userguide/building_java_projects.html
+ */
+
+plugins {
+    id 'groovy'
+    id 'java-library'
+}
+
+repositories {
+    // Use Maven Central for resolving dependencies.
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation 'org.codehaus.groovy:groovy:3.0.7'
+    testImplementation 'org.spockframework:spock-core:2.0-M4-groovy-3.0'
+    testImplementation 'junit:junit:4.13.1'
+    testImplementation 'org.slf4j:slf4j-api:1.7.30'
+
+    implementation 'org.slf4j:slf4j-api:1.7.30'
+    implementation 'org.slf4j:slf4j-simple:1.7.30'
+
+}
+
+tasks.named('test') {
+    // Use junit platform for unit tests.
+    useJUnitPlatform()
+}

shared/src/main/java/org/sysmon/shared/MetricBean.java

@@ -0,0 +1,7 @@
+package org.sysmon.shared;
+
+public interface MetricBean {
+
+    public MetricResult getMetrics();
+
+}

shared/src/main/java/org/sysmon/shared/MetricMeasurement.java

@@ -0,0 +1,17 @@
+package org.sysmon.shared;
+
+public class MetricMeasurement {
+
+    private String name;
+    private Object value;
+
+    public MetricMeasurement(String name, Object value) {
+        this.name = name;
+        this.value = value;
+    }
+
+    public String toString() {
+        return String.format("%s: %s", name, value);
+    }
+
+}

shared/src/main/java/org/sysmon/shared/MetricResult.java

@@ -0,0 +1,31 @@
+package org.sysmon.shared;
+
+import java.time.Instant;
+import java.util.List;
+
+public class MetricResult {
+    
+    private final String name;
+    private final Instant timestamp;
+    private List<MetricMeasurement> measurementList;
+
+    public MetricResult(String name) {
+        this.name = name;
+        this.timestamp = Instant.now();
+    }
+
+    public void setMeasurementList(List<MetricMeasurement> measurementList) {
+        this.measurementList = measurementList;
+    }
+
+
+    public String toString() {
+        StringBuilder sb = new StringBuilder(name).append("\n");
+        for(MetricMeasurement mm : measurementList) {
+            sb.append(mm.toString()).append("\n");
+        }
+
+        return sb.toString();
+    }
+    
+}