✨ Expose reporting config to consumers of javaagent-core so that `F…

…ilter` implementation authors can access them (#327)

javaagent-core/src/main/java/org/hypertrace/agent/core/config/ReportingConfig.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright The Hypertrace 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
+ *
+ *     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 org.hypertrace.agent.core.config;
+
+import java.util.Iterator;
+import java.util.ServiceLoader;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public interface ReportingConfig {
+
+  /**
+   * @return the {@link Opa} config implementation
+   * @see Opa for more information on why this API is deprecated
+   */
+  @Deprecated
+  Opa opa();
+
+  boolean secure();
+
+  String token();
+
+  /**
+   * Opa holds the configuration for the agent and filter implementations should interact with a
+   * remote Open Policy Agent endpoint.
+   *
+   * <p>Note, this API is deprecated because it is a goal of the Hypertrace community to migrate
+   * away form supplying this vendor-specific config and instead have authors of Hypertrace
+   * extensions/filters to have an indiomatic way to extned the Hypertrace configuration properties
+   * for their use cases
+   */
+  @Deprecated
+  interface Opa {
+
+    boolean enabled();
+
+    String endpoint();
+
+    int pollPeriodSeconds();
+  }
+
+  final class ConfigProvider {
+
+    private static final Logger logger = LoggerFactory.getLogger(ConfigProvider.class);
+
+    private static volatile ReportingConfig reportingConfig;
+
+    private static ReportingConfig load() {
+      ServiceLoader<ReportingConfig> configs = ServiceLoader.load(ReportingConfig.class);
+      Iterator<ReportingConfig> iterator = configs.iterator();
+      if (!iterator.hasNext()) {
+        logger.error("Failed to load reporting config");
+        return null;
+      }
+      return iterator.next();
+    }
+
+    public static ReportingConfig get() {
+      if (reportingConfig == null) {
+        synchronized (ConfigProvider.class) {
+          if (reportingConfig == null) {
+            reportingConfig = load();
+          }
+        }
+      }
+      return reportingConfig;
+    }
+  }
+}

otel-extensions/src/main/java/org/hypertrace/agent/otel/extensions/config/InstrumentationConfigImpl.java

@@ -20,6 +20,7 @@
 import org.hypertrace.agent.config.Config;
 import org.hypertrace.agent.config.Config.AgentConfig;
 import org.hypertrace.agent.config.Config.DataCapture;
+import org.hypertrace.agent.config.Config.Message;
 import org.hypertrace.agent.core.config.InstrumentationConfig;
 
 @AutoService(InstrumentationConfig.class)
@@ -65,7 +66,7 @@ public Message rpcBody() {
     return this.rpcBody;
   }
 
-  private class MessageImpl implements Message {
+  private static final class MessageImpl implements Message {
 
     private final Config.Message message;
 

otel-extensions/src/main/java/org/hypertrace/agent/otel/extensions/config/ReportingConfigImpl.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright The Hypertrace 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
+ *
+ *     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 org.hypertrace.agent.otel.extensions.config;
+
+import com.google.auto.service.AutoService;
+import org.hypertrace.agent.config.Config;
+import org.hypertrace.agent.core.config.ReportingConfig;
+
+@AutoService(ReportingConfig.class)
+public final class ReportingConfigImpl implements ReportingConfig {
+
+  private final Opa opa;
+  private final Config.Reporting reporting;
+
+  public ReportingConfigImpl(final Config.Reporting reporting) {
+    this.opa = new OpaImpl(reporting.getOpa());
+    this.reporting = reporting;
+  }
+
+  @Override
+  public Opa opa() {
+    return opa;
+  }
+
+  @Override
+  public boolean secure() {
+    return reporting.getSecure().getValue();
+  }
+
+  @Override
+  public String token() {
+    return reporting.getToken().getValue();
+  }
+
+  private static final class OpaImpl implements Opa {
+
+    private final Config.Opa opa;
+
+    public OpaImpl(final Config.Opa opa) {
+      this.opa = opa;
+    }
+
+    @Override
+    public boolean enabled() {
+      return opa.hasEnabled() ? opa.getEnabled().getValue() : true;
+    }
+
+    @Override
+    public String endpoint() {
+      return opa.getEndpoint().getValue();
+    }
+
+    @Override
+    public int pollPeriodSeconds() {
+      return opa.getPollPeriodSeconds().getValue();
+    }
+  }
+}