#1855 - Add MetaInfoManager collectMetricsAsJson()

src/main/java/io/ebean/meta/MetaInfoManager.java

@@ -16,6 +16,18 @@ public interface MetaInfoManager {
    */
   ServerMetrics collectMetrics();
 
+  /**
+   * Collect the metrics in raw JSON form.
+   * <pre>{@code
+   *
+   *   String metricsJson = database.getMetaInfoManager()
+   *       .collectMetricsAsJson()
+   *       .json();
+   *
+   * }</pre>
+   */
+  ServerMetricsAsJson collectMetricsAsJson();
+
   /**
    * Collect query plans.
    */

src/main/java/io/ebean/meta/ServerMetricsAsJson.java

@@ -0,0 +1,40 @@
+package io.ebean.meta;
+
+import java.util.Comparator;
+
+/**
+ * Collect the metrics in raw JSON form.
+ */
+public interface ServerMetricsAsJson {
+
+  /**
+   * Set to false to exclude profile location.
+   */
+  ServerMetricsAsJson withLocation(boolean withLocation);
+
+  /**
+   * Set to false to exclude SQL for query metrics.
+   */
+  ServerMetricsAsJson withSql(boolean withSql);
+
+  /**
+   * Set to false to exclude SQL hash.
+   */
+  ServerMetricsAsJson withHash(boolean withHash);
+
+  /**
+   * Set the sort property - see SortMetric
+   * @see SortMetric
+   */
+  ServerMetricsAsJson withSort(Comparator<MetaTimedMetric> sortBy);
+
+  /**
+   * Set the new line character to use.
+   */
+  ServerMetricsAsJson withNewLine(boolean withNewLine);
+
+  /**
+   * Return the metrics in raw JSON.
+   */
+  String json();
+}

src/main/java/io/ebeaninternal/server/core/DefaultMetaInfoManager.java

@@ -12,6 +12,7 @@ import io.ebean.meta.MetaTimedMetric;
 import io.ebean.meta.MetricVisitor;
 import io.ebean.meta.QueryPlanRequest;
 import io.ebean.meta.ServerMetrics;
+import io.ebean.meta.ServerMetricsAsJson;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -42,6 +43,11 @@ public class DefaultMetaInfoManager implements MetaInfoManager {
     return visitBasic();
   }
 
+  @Override
+  public ServerMetricsAsJson collectMetricsAsJson() {
+    return new DumpMetricsJson(server);
+  }
+
   @Override
   public BasicMetricVisitor visitBasic() {
     BasicMetricVisitor basic = new BasicMetricVisitor();

src/main/java/io/ebeaninternal/server/core/DumpMetricsJson.java

@@ -0,0 +1,232 @@
+package io.ebeaninternal.server.core;
+
+import io.ebean.Database;
+import io.ebean.ProfileLocation;
+import io.ebean.meta.MetaCountMetric;
+import io.ebean.meta.MetaOrmQueryMetric;
+import io.ebean.meta.MetaQueryMetric;
+import io.ebean.meta.MetaTimedMetric;
+import io.ebean.meta.ServerMetrics;
+import io.ebean.meta.ServerMetricsAsJson;
+import io.ebean.meta.SortMetric;
+
+import java.io.StringWriter;
+import java.util.Comparator;
+import java.util.List;
+
+class DumpMetricsJson implements ServerMetricsAsJson {
+
+  private final Database database;
+
+  private final StringWriter writer = new StringWriter();
+
+  private boolean dumpHash = true;
+  private boolean dumpSql = true;
+  private boolean dumpLoc = true;
+
+  private Comparator<MetaTimedMetric> sortBy = SortMetric.NAME;
+
+  private int listCounter;
+  private int objKeyCounter;
+
+  private String newLine = "\n";
+
+  DumpMetricsJson(Database database) {
+    this.database = database;
+  }
+
+  @Override
+  public ServerMetricsAsJson withLocation(boolean withLocation) {
+    this.dumpLoc = withLocation;
+    return this;
+  }
+
+  @Override
+  public ServerMetricsAsJson withSql(boolean withSql) {
+    this.dumpSql = withSql;
+    return this;
+  }
+
+  @Override
+  public ServerMetricsAsJson withHash(boolean withHash) {
+    this.dumpHash = withHash;
+    return this;
+  }
+
+  @Override
+  public ServerMetricsAsJson withSort(Comparator<MetaTimedMetric> sortBy) {
+    this.sortBy = sortBy;
+    return this;
+  }
+
+  @Override
+  public ServerMetricsAsJson withNewLine(boolean withNewLine) {
+    this.newLine = withNewLine ? "\n" : "";
+    return this;
+  }
+
+  @Override
+  public String json() {
+    collect(database.getMetaInfoManager().collectMetrics());
+    return writer.toString();
+  }
+
+
+  private void collect(ServerMetrics serverMetrics) {
+
+    start();
+    for (MetaTimedMetric metric : serverMetrics.getTimedMetrics()) {
+      log(metric);
+    }
+
+    List<MetaCountMetric> countMetrics = serverMetrics.getCountMetrics();
+    if (!countMetrics.isEmpty()) {
+      if (sortBy != null) {
+        countMetrics.sort(SortMetric.COUNT_NAME);
+      }
+      for (MetaCountMetric metric : countMetrics) {
+        logCount(metric);
+      }
+    }
+
+    List<MetaOrmQueryMetric> ormQueryMetrics = serverMetrics.getOrmQueryMetrics();
+    if (!ormQueryMetrics.isEmpty()) {
+      if (sortBy != null) {
+        ormQueryMetrics.sort(sortBy);
+      }
+      for (MetaOrmQueryMetric metric : ormQueryMetrics) {
+        logQuery(metric);
+      }
+    }
+
+    List<MetaQueryMetric> dtoQueryMetrics = serverMetrics.getDtoQueryMetrics();
+    if (!dtoQueryMetrics.isEmpty()) {
+      if (sortBy != null) {
+        dtoQueryMetrics.sort(sortBy);
+      }
+      for (MetaQueryMetric metric : dtoQueryMetrics) {
+        logDtoQuery(metric);
+      }
+    }
+    end();
+  }
+
+  private void start() {
+    objStart();
+    key("db");
+    val(database.getName());
+    key("metrics");
+    listStart();
+  }
+
+  private void end() {
+    listEnd();
+    objEnd();
+  }
+
+  private void objStart() {
+    objKeyCounter = 0;
+    writer.append("{");
+  }
+
+  private void objEnd() {
+    writer.append("}");
+  }
+
+  private void listStart() {
+    listCounter = 0;
+    writer.append("[");
+    writer.append(newLine);
+  }
+
+  private void listEnd() {
+    writer.append("]");
+  }
+
+  private void key(String key) {
+    if (objKeyCounter++ > 0) {
+      writer.append(", ");
+    }
+    writer.append("\"").append(key).append("\":");
+  }
+
+  private void val(long count) {
+    writer.append(Long.toString(count));
+  }
+
+  private void val(String val) {
+    writer.append("\"").append(val).append("\"");
+  }
+
+  private void log(MetaTimedMetric metric) {
+
+    metricStart();
+    key("name");
+    val(metric.getName());
+    appendCounters(metric);
+    objEnd();
+  }
+
+  private void metricStart() {
+    if (listCounter++ > 0) {
+      writer.append(",").append(newLine);
+    }
+    objStart();
+  }
+
+  private void logCount(MetaCountMetric metric) {
+    metricStart();
+    key("name");
+    val(metric.getName());
+    key("count");
+    val(metric.getCount());
+    objEnd();
+  }
+
+  private void logQuery(MetaOrmQueryMetric metric) {
+
+    metricStart();
+    key("name");
+    val(metric.getName());
+    appendCounters(metric);
+    if (dumpHash) {
+      key("hash");
+      val(metric.getSqlHash());
+    }
+    appendProfileAndSql(metric);
+    objEnd();
+  }
+
+  private void logDtoQuery(MetaQueryMetric metric) {
+
+    metricStart();
+    key("name");
+    val(metric.getName());
+    appendCounters(metric);
+    appendProfileAndSql(metric);
+    objEnd();
+  }
+
+  private void appendProfileAndSql(MetaQueryMetric metric) {
+    ProfileLocation profileLocation = metric.getProfileLocation();
+    if (dumpLoc && profileLocation != null) {
+      key("loc");
+      val(profileLocation.shortDescription());
+    }
+    if (dumpSql) {
+      key("sql");
+      val(metric.getSql());
+    }
+  }
+
+  private void appendCounters(MetaTimedMetric timedMetric) {
+    key("count");
+    val(timedMetric.getCount());
+    key("total");
+    val(timedMetric.getTotal());
+    key("mean");
+    val(timedMetric.getMean());
+    key("max");
+    val(timedMetric.getMax());
+  }
+}