fix(serialization): no-args constructors and non-final fields for Jackson

src/main/java/io/cryostat/core/net/MBeanMetrics.java

@@ -16,11 +16,14 @@
 package io.cryostat.core.net;
 
 public class MBeanMetrics {
-    private final RuntimeMetrics runtime;
-    private final MemoryMetrics memory;
-    private final ThreadMetrics thread;
-    private final OperatingSystemMetrics os;
-    private final String jvmId;
+
+    private RuntimeMetrics runtime;
+    private MemoryMetrics memory;
+    private ThreadMetrics thread;
+    private OperatingSystemMetrics os;
+    private String jvmId;
+
+    public MBeanMetrics() {}
 
     public MBeanMetrics(
             RuntimeMetrics runtimeDetails,

src/main/java/io/cryostat/core/net/MemoryMetrics.java

@@ -21,13 +21,15 @@
 import org.apache.commons.lang3.builder.ToStringBuilder;
 
 public class MemoryMetrics {
-    private final MemoryUtilization heapMemoryUsage;
-    private final MemoryUtilization nonHeapMemoryUsage;
-    private final long objectPendingFinalizationCount;
-    private final long freeHeapMemory;
-    private final long freeNonHeapMemory;
-    private final double heapMemoryUsagePercent;
-    private final boolean verbose;
+    private MemoryUtilization heapMemoryUsage;
+    private MemoryUtilization nonHeapMemoryUsage;
+    private long objectPendingFinalizationCount;
+    private long freeHeapMemory;
+    private long freeNonHeapMemory;
+    private double heapMemoryUsagePercent;
+    private boolean verbose;
+
+    public MemoryMetrics() {}
 
     public MemoryMetrics(Map<String, Object> attributes) {
         this.heapMemoryUsage =

src/main/java/io/cryostat/core/net/MemoryUtilization.java

@@ -19,10 +19,12 @@
 
 public class MemoryUtilization {
 
-    private final long init;
-    private final long used;
-    private final long committed;
-    private final long max;
+    private long init;
+    private long used;
+    private long committed;
+    private long max;
+
+    public MemoryUtilization() {}
 
     public MemoryUtilization(long init, long used, long committed, long max) {
         this.init = init;

src/main/java/io/cryostat/core/net/OperatingSystemMetrics.java

@@ -21,19 +21,21 @@
 import org.apache.commons.lang3.builder.ToStringBuilder;
 
 public class OperatingSystemMetrics {
-    private final String arch;
-    private final int availableProcessors;
-    private final String name;
-    private final double systemLoadAverage;
-    private final String version;
-    private final long committedVirtualMemorySize;
-    private final long freePhysicalMemorySize;
-    private final long freeSwapSpaceSize;
-    private final double processCpuLoad;
-    private final long processCpuTime;
-    private final double systemCpuLoad;
-    private final long totalPhysicalMemorySize;
-    private final long totalSwapSpaceSize;
+    private String arch;
+    private int availableProcessors;
+    private String name;
+    private double systemLoadAverage;
+    private String version;
+    private long committedVirtualMemorySize;
+    private long freePhysicalMemorySize;
+    private long freeSwapSpaceSize;
+    private double processCpuLoad;
+    private long processCpuTime;
+    private double systemCpuLoad;
+    private long totalPhysicalMemorySize;
+    private long totalSwapSpaceSize;
+
+    public OperatingSystemMetrics() {}
 
     public OperatingSystemMetrics(Map<String, Object> attributes) {
         this.arch = (String) attributes.getOrDefault("Arch", StringUtils.EMPTY);

src/main/java/io/cryostat/core/net/RuntimeMetrics.java

@@ -26,22 +26,24 @@
 import org.apache.commons.lang3.builder.ToStringBuilder;
 
 public class RuntimeMetrics {
-    private final String bootClassPath;
-    private final String classPath;
-    private final String[] inputArguments;
-    private final String libraryPath;
-    private final String managementSpecVersion;
-    private final String name;
-    private final String specName;
-    private final String specVendor;
-    private final String specVersion;
-    private final Map<String, String> systemProperties;
-    private final long startTime;
-    private final long uptime;
-    private final String vmName;
-    private final String vmVendor;
-    private final String vmVersion;
-    private final boolean bootClassPathSupported;
+    private String bootClassPath;
+    private String classPath;
+    private String[] inputArguments;
+    private String libraryPath;
+    private String managementSpecVersion;
+    private String name;
+    private String specName;
+    private String specVendor;
+    private String specVersion;
+    private Map<String, String> systemProperties;
+    private long startTime;
+    private long uptime;
+    private String vmName;
+    private String vmVendor;
+    private String vmVersion;
+    private boolean bootClassPathSupported;
+
+    public RuntimeMetrics() {}
 
     public RuntimeMetrics(Map<String, Object> attributes) {
         this.bootClassPath = (String) attributes.getOrDefault("BootClassPath", StringUtils.EMPTY);

src/main/java/io/cryostat/core/net/ThreadMetrics.java

@@ -21,20 +21,22 @@
 import org.apache.commons.lang3.builder.ToStringBuilder;
 
 public class ThreadMetrics {
-    private final long[] allThreadIds;
-    private final long currentThreadCpuTime;
-    private final long currentThreadUserTime;
-    private final int daemonThreadCount;
-    private final int peakThreadCount;
-    private final int threadCount;
-    private final long totalStartedThreadCount;
-    private final boolean currentThreadCpuTimeSupported;
-    private final boolean objectMonitorUsageSupported;
-    private final boolean synchronizerUsageSupported;
-    private final boolean threadContentionMonitoringEnabled;
-    private final boolean threadContentionMonitoringSupported;
-    private final boolean threadCpuTimeEnabled;
-    private final boolean threadCpuTimeSupported;
+    private long[] allThreadIds;
+    private long currentThreadCpuTime;
+    private long currentThreadUserTime;
+    private int daemonThreadCount;
+    private int peakThreadCount;
+    private int threadCount;
+    private long totalStartedThreadCount;
+    private boolean currentThreadCpuTimeSupported;
+    private boolean objectMonitorUsageSupported;
+    private boolean synchronizerUsageSupported;
+    private boolean threadContentionMonitoringEnabled;
+    private boolean threadContentionMonitoringSupported;
+    private boolean threadCpuTimeEnabled;
+    private boolean threadCpuTimeSupported;
+
+    public ThreadMetrics() {}
 
     public ThreadMetrics(Map<String, Object> attributes) {
         this.allThreadIds = (long[]) attributes.getOrDefault("AllThreadIds", new long[0]);

src/main/java/io/cryostat/core/serialization/SerializableEventTypeInfo.java

@@ -34,6 +34,8 @@ public class SerializableEventTypeInfo {
     private String[] category;
     private Map<String, SerializableOptionDescriptor> options;
 
+    public SerializableEventTypeInfo() {}
+
     public SerializableEventTypeInfo(IEventTypeInfo orig) {
         this.name = orig.getName();
         this.typeId = orig.getEventTypeID().getFullKey();

src/main/java/io/cryostat/core/serialization/SerializableOptionDescriptor.java

@@ -27,6 +27,8 @@ public class SerializableOptionDescriptor {
     private String description;
     private String defaultValue;
 
+    public SerializableOptionDescriptor() {}
+
     public SerializableOptionDescriptor(IOptionDescriptor<?> orig) {
         this.name = orig.getName();
         this.description = orig.getDescription();

src/main/java/io/cryostat/core/serialization/SerializableRecordingDescriptor.java

@@ -42,6 +42,8 @@ public class SerializableRecordingDescriptor {
     protected long maxSize;
     protected long maxAge;
 
+    public SerializableRecordingDescriptor() {}
+
     public SerializableRecordingDescriptor(
             long id,
             String name,