Prototypical functionality added for #22.

src/main/java/io/honeybadger/reporter/dto/Load.java

@@ -0,0 +1,111 @@
+package io.honeybadger.reporter.dto;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.Serializable;
+import java.lang.management.ManagementFactory;
+import java.lang.management.OperatingSystemMXBean;
+import java.util.Scanner;
+
+/**
+ * Class containing statistics about the host system's load average.
+ *
+ * @author <a href="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/dekobon">Elijah Zupancic</a>
+ * @since 1.0.11
+ */
+public class Load implements Serializable {
+    private static final long serialVersionUID = 3398000045209329774L;
+
+    public final Number one;
+    public final Number five;
+    public final Number fifteen;
+
+    public Load() {
+        Number[] loadAverages = findLoadAverages();
+        this.one = loadAverages[0];
+        this.five = loadAverages[1];
+        this.fifteen = loadAverages[2];
+    }
+
+    public Load(Number one, Number five, Number fifteen) {
+        this.one = one;
+        this.five = five;
+        this.fifteen = fifteen;
+    }
+
+    /**
+     * Attempts to find all three load values in a way that is safe for an in-process
+     * operation. This leads to platform specific code. We attempt to avoid forking to
+     * call external processes because this would be a bad thing to do on every error
+     * that came into the system.
+     *
+     * @return an array containing all three load averages (1, 5, 15) in that order
+     */
+    static Number[] findLoadAverages() {
+        OperatingSystemMXBean osBean = ManagementFactory.getOperatingSystemMXBean();
+        String os = osBean.getName();
+
+        if (os.equals("Linux")) {
+            File loadavg = new File("/proc/loadavg");
+
+            if (loadavg.exists() &&  loadavg.isFile() && loadavg.canRead()) {
+                try (Scanner scanner = new Scanner(loadavg)) {
+                    if (!scanner.hasNext()) {
+                        return defaultLoadAverages(osBean);
+                    }
+
+                    String line = scanner.nextLine();
+                    String[] values = line.split(" ", 3);
+
+                    return new Number[]{
+                            Double.parseDouble(values[0]),
+                            Double.parseDouble(values[1]),
+                            Double.parseDouble(values[2])
+                    };
+
+                } catch (Exception e) {
+                    return defaultLoadAverages(osBean);
+                }
+            } else {
+                return defaultLoadAverages(osBean);
+            }
+
+        } else {
+            return defaultLoadAverages(osBean);
+        }
+    }
+
+    static Number[] defaultLoadAverages(OperatingSystemMXBean osBean) {
+        return new Number[] { osBean.getSystemLoadAverage(), -1, -1 };
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Load load = (Load) o;
+
+        if (one != null ? !one.equals(load.one) : load.one != null) return false;
+        if (five != null ? !five.equals(load.five) : load.five != null) return false;
+        return !(fifteen != null ? !fifteen.equals(load.fifteen) : load.fifteen != null);
+
+    }
+
+    @Override
+    public int hashCode() {
+        int result = one != null ? one.hashCode() : 0;
+        result = 31 * result + (five != null ? five.hashCode() : 0);
+        result = 31 * result + (fifteen != null ? fifteen.hashCode() : 0);
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return "Load{" +
+                "one=" + one +
+                ", five=" + five +
+                ", fifteen=" + fifteen +
+                '}';
+    }
+}

src/main/java/io/honeybadger/reporter/dto/Memory.java

@@ -0,0 +1,72 @@
+package io.honeybadger.reporter.dto;
+
+import java.io.Serializable;
+
+/**
+ * Class containing the current state of memory on the running JVM.
+ *
+ * @author <a href="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/dekobon">Elijah Zupancic</a>
+ * @since 1.0.11
+ */
+public class Memory implements Serializable {
+    private static final long serialVersionUID = -8799953046383217102L;
+
+    public final Number total;
+    public final Number free;
+    public final Number buffers;
+    public final Number cached;
+    public final Number free_total;
+
+    public Memory() {
+        final Runtime r = Runtime.getRuntime();
+        this.total = r.totalMemory();
+        this.free = r.freeMemory();
+        this.buffers = -1;
+        this.cached = -1;
+        this.free_total = r.maxMemory() - (r.totalMemory() - r.freeMemory());
+    }
+
+    public Memory(Number total, Number free, Number buffers, Number cached, Number free_total) {
+        this.total = total;
+        this.free = free;
+        this.buffers = buffers;
+        this.cached = cached;
+        this.free_total = free_total;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Memory memory = (Memory) o;
+
+        if (total != null ? !total.equals(memory.total) : memory.total != null) return false;
+        if (free != null ? !free.equals(memory.free) : memory.free != null) return false;
+        if (buffers != null ? !buffers.equals(memory.buffers) : memory.buffers != null) return false;
+        if (cached != null ? !cached.equals(memory.cached) : memory.cached != null) return false;
+        return !(free_total != null ? !free_total.equals(memory.free_total) : memory.free_total != null);
+
+    }
+
+    @Override
+    public int hashCode() {
+        int result = total != null ? total.hashCode() : 0;
+        result = 31 * result + (free != null ? free.hashCode() : 0);
+        result = 31 * result + (buffers != null ? buffers.hashCode() : 0);
+        result = 31 * result + (cached != null ? cached.hashCode() : 0);
+        result = 31 * result + (free_total != null ? free_total.hashCode() : 0);
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return "Memory{" +
+                "total=" + total +
+                ", free=" + free +
+                ", buffers=" + buffers +
+                ", cached=" + cached +
+                ", free_total=" + free_total +
+                '}';
+    }
+}

src/main/java/io/honeybadger/reporter/dto/ServerDetails.java

@@ -6,8 +6,13 @@
 import java.io.File;
 import java.io.IOException;
 import java.io.Serializable;
+import java.lang.management.ManagementFactory;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.TimeZone;
 
 /**
  * Server details at the time an error occurred.
@@ -21,17 +26,27 @@ public class ServerDetails implements Serializable {
     public final String environment_name;
     public final String hostname;
     public final String project_root;
+    public final Integer pid;
+    public final String time;
+    public final Stats stats;
 
     public ServerDetails() {
         this.environment_name = environment();
         this.hostname = hostname();
         this.project_root = projectRoot();
+        this.pid = pid();
+        this.time = time();
+        this.stats = new Stats();
     }
 
-    public ServerDetails(String environment_name, String hostname, String project_root) {
+    public ServerDetails(String environment_name, String hostname, String project_root,
+                         Integer pid, String time, Stats stats) {
         this.environment_name = environment_name;
         this.hostname = hostname;
         this.project_root = project_root;
+        this.pid = pid;
+        this.time = time;
+        this.stats = stats;
     }
 
     /**
@@ -100,6 +115,39 @@ protected static String projectRoot() {
         }
     }
 
+    /**
+     * Finds the process id for the running JVM.
+     *
+     * @see <a href="https://stackoverflow.com/questions/35842/how-can-a-java-program-get-its-own-process-id/7690178#7690178>refrenced this implementation</a>
+     * @return process id or null if not found
+     */
+    protected static Integer pid() {
+        // something like '<pid>@<hostname>', at least in SUN / Oracle JVMs
+        final String jvmName = ManagementFactory.getRuntimeMXBean().getName();
+        final int index = jvmName.indexOf('@');
+
+        if (index < 1) {
+            // part before '@' empty (index = 0) / '@' not found (index = -1)
+            return null;
+        }
+
+        try {
+            return Integer.parseInt(jvmName.substring(0, index));
+        } catch (NumberFormatException e) {
+            return null;
+        }
+    }
+
+    /**
+     * @return The current time in ISO-8601 format.
+     */
+    public static String time() {
+        TimeZone tz = TimeZone.getTimeZone("UTC");
+        DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm'Z'");
+        formatter.setTimeZone(tz);
+        return formatter.format(new Date());
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;
@@ -110,7 +158,8 @@ public boolean equals(Object o) {
         if (environment_name != null ? !environment_name.equals(that.environment_name) : that.environment_name != null)
             return false;
         if (hostname != null ? !hostname.equals(that.hostname) : that.hostname != null) return false;
-        return !(project_root != null ? !project_root.equals(that.project_root) : that.project_root != null);
+        if (project_root != null ? !project_root.equals(that.project_root) : that.project_root != null) return false;
+        return !(pid != null ? !pid.equals(that.pid) : that.pid != null);
 
     }
 
@@ -119,6 +168,18 @@ public int hashCode() {
         int result = environment_name != null ? environment_name.hashCode() : 0;
         result = 31 * result + (hostname != null ? hostname.hashCode() : 0);
         result = 31 * result + (project_root != null ? project_root.hashCode() : 0);
+        result = 31 * result + (pid != null ? pid.hashCode() : 0);
         return result;
     }
+
+    @Override
+    public String toString() {
+        return "ServerDetails{" +
+                "environment_name='" + environment_name + '\'' +
+                ", hostname='" + hostname + '\'' +
+                ", project_root='" + project_root + '\'' +
+                ", pid=" + pid +
+                ", stats=" + stats +
+                '}';
+    }
 }

src/main/java/io/honeybadger/reporter/dto/Stats.java

@@ -0,0 +1,53 @@
+package io.honeybadger.reporter.dto;
+
+import java.io.Serializable;
+
+/**
+ * Class containing the statistics about the running JVM.
+ *
+ * @author <a href="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/dekobon">Elijah Zupancic</a>
+ * @since 1.0.11
+ */
+public class Stats implements Serializable {
+    private static final long serialVersionUID = 4563609532018909058L;
+
+    public final Memory mem;
+    public final Load load;
+
+    public Stats() {
+        this.mem = new Memory();
+        this.load = new Load();
+    }
+
+    public Stats(Memory mem, Load load) {
+        this.mem = mem;
+        this.load = load;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Stats stats = (Stats) o;
+
+        if (mem != null ? !mem.equals(stats.mem) : stats.mem != null) return false;
+        return !(load != null ? !load.equals(stats.load) : stats.load != null);
+
+    }
+
+    @Override
+    public int hashCode() {
+        int result = mem != null ? mem.hashCode() : 0;
+        result = 31 * result + (load != null ? load.hashCode() : 0);
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return "Stats{" +
+                "mem=" + mem +
+                ", load=" + load +
+                '}';
+    }
+}