fix(spi): handle errors during SPI loading to ensure we do not break …

CHANGELOG.md

@@ -1,6 +1,8 @@
 # main - Unreleased
  - **[FEATURE]**: plugin: Add plugin for Otel [#87](https://github.com/intergral/deep/pull/87) [@Umaaz](https://github.com/Umaaz)
  - **[FEATURE]**: traces: Add apis for creating traces from tracepoints [#87](https://github.com/intergral/deep/pull/87) [@Umaaz](https://github.com/Umaaz)
+ - **[BUGFIX]**: fix issue with SPI loading failing [#92](https://github.com/intergral/deep/pull/92) [@Umaaz](https://github.com/Umaaz)
+ - **[BUGFIX]**: fix issue with method entry tracepoings [#91](https://github.com/intergral/deep/pull/91) [@Umaaz](https://github.com/Umaaz)
 
 # 1.1.4 (15/12/2023)
 - **[CHANGE]**: plugin: Add new API for registering plugins [#84](https://github.com/intergral/deep/pull/84) [@Umaaz](https://github.com/Umaaz) 

agent/src/main/java/com/intergral/deep/agent/resource/SpiUtil.java

@@ -8,14 +8,19 @@
 import com.intergral.deep.agent.api.spi.Ordered;
 import java.util.ArrayList;
 import java.util.Comparator;
+import java.util.Iterator;
 import java.util.List;
 import java.util.ServiceLoader;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Utilities to load SPI services.
  */
 public final class SpiUtil {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(SpiUtil.class);
+
   private SpiUtil() {
   }
 
@@ -28,8 +33,15 @@ public static <T extends Ordered> List<T> loadOrdered(Class<T> spiClass,
   static <T extends Ordered> List<T> loadOrdered(
       Class<T> spiClass, ClassLoader serviceClassLoader, ServiceLoaderFinder serviceLoaderFinder) {
     List<T> result = new ArrayList<>();
-    for (T service : serviceLoaderFinder.load(spiClass, serviceClassLoader)) {
-      result.add(service);
+    final Iterator<T> iterator = serviceLoaderFinder.load(spiClass, serviceClassLoader).iterator();
+    while (iterator.hasNext()) {
+      try {
+        result.add(iterator.next());
+      } catch (Throwable t) {
+        // WARNING - exception from this will have the wrong stack trace
+        // the error will come from 'hasNext' not 'next'
+        LOGGER.error("Cannot load provider.", t);
+      }
     }
     result.sort(Comparator.comparing(Ordered::order));
     return result;

agent/src/test/java/com/intergral/deep/agent/resource/ITestProvider.java

@@ -0,0 +1,27 @@
+/*
+ *     Copyright (C) 2023  Intergral GmbH
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU Affero General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU Affero General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Affero General Public License
+ *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.intergral.deep.agent.resource;
+
+import com.intergral.deep.agent.api.spi.Ordered;
+
+/**
+ * This type is used to test SPI loading.
+ */
+public interface ITestProvider extends Ordered {
+
+}

agent/src/test/java/com/intergral/deep/agent/resource/SpiUtilTest.java

@@ -46,4 +46,10 @@ void loadsOrderedSpi() {
 
     assertEquals(3, loadedSpi.size());
   }
+
+  @Test
+  void canHandleConfigErrors() {
+    final List<ITestProvider> ts = SpiUtil.loadOrdered(ITestProvider.class, getClass().getClassLoader());
+    assertEquals(1, ts.size());
+  }
 }

agent/src/test/java/com/intergral/deep/agent/resource/TestProvider.java

@@ -0,0 +1,26 @@
+/*
+ *     Copyright (C) 2023  Intergral GmbH
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU Affero General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU Affero General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Affero General Public License
+ *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.intergral.deep.agent.resource;
+
+
+/**
+ * This type is used to test SPI loading.
+ */
+public class TestProvider implements ITestProvider {
+
+}

agent/src/test/resources/META-INF/services/com.intergral.deep.agent.resource.ITestProvider

@@ -0,0 +1,19 @@
+#
+#     Copyright (C) 2024  Intergral GmbH
+#
+#     This program is free software: you can redistribute it and/or modify
+#     it under the terms of the GNU Affero General Public License as published by
+#     the Free Software Foundation, either version 3 of the License, or
+#     (at your option) any later version.
+#
+#     This program is distributed in the hope that it will be useful,
+#     but WITHOUT ANY WARRANTY; without even the implied warranty of
+#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#     GNU Affero General Public License for more details.
+#
+#     You should have received a copy of the GNU Affero General Public License
+#     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+com.intergral.deep.agent.resource.TestProvider
+com.intergral.deep.agent.test.NotExists

examples/agent-only-load/.gitignore

@@ -0,0 +1,38 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

examples/agent-only-load/pom.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~     Copyright (C) 2023  Intergral GmbH
+  ~
+  ~     This program is free software: you can redistribute it and/or modify
+  ~     it under the terms of the GNU Affero General Public License as published by
+  ~     the Free Software Foundation, either version 3 of the License, or
+  ~     (at your option) any later version.
+  ~
+  ~     This program is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~     GNU Affero General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU Affero General Public License
+  ~     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>com.intergral.deep.examples</groupId>
+    <artifactId>examples</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <relativePath>../pom.xml</relativePath>
+  </parent>
+
+  <artifactId>agent-only-load</artifactId>
+  <name>Agent Load</name>
+  <description>This example uses the agent load (-javaagent) to load the deep agent. It therefore
+    has no dependencies of code related to deep.
+  </description>
+
+  <properties>
+    <maven.compiler.source>8</maven.compiler.source>
+    <maven.compiler.target>8</maven.compiler.target>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <dependencies>
+  </dependencies>
+</project>

examples/agent-only-load/src/main/java/com/intergral/deep/examples/BaseTest.java

@@ -0,0 +1,50 @@
+/*
+ *     Copyright (C) 2023  Intergral GmbH
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU Affero General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU Affero General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Affero General Public License
+ *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.intergral.deep.examples;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Properties;
+import java.util.UUID;
+
+public class BaseTest {
+
+  protected final Properties systemProps = System.getProperties();
+
+
+  public String newId() {
+    return UUID.randomUUID().toString();
+  }
+
+
+  public Map<Character, Integer> makeCharCountMap(final String str) {
+    final HashMap<Character, Integer> res = new HashMap<Character, Integer>();
+
+    for (int i = 0; i < str.length(); i++) {
+      final char c = str.charAt(i);
+      final Integer cnt = res.get(c);
+      if (cnt == null) {
+        res.put(c, 0);
+      } else {
+        res.put(c, cnt + 1);
+      }
+    }
+
+    return res;
+  }
+}

examples/agent-only-load/src/main/java/com/intergral/deep/examples/Main.java

@@ -0,0 +1,54 @@
+/*
+ *     Copyright (C) 2023  Intergral GmbH
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU Affero General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU Affero General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Affero General Public License
+ *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.intergral.deep.examples;
+
+
+
+/**
+ * This example expects the deep agent to be loaded via the javaagent vm option.
+ * <p>
+ * See RunConfigurations for IDEA:
+ * <ul>
+ *   <li>Agent ONLY Load with JavaAgent</li>
+ * </ul>
+ */
+public class Main {
+
+  /**
+   * Main entry for example.
+   *
+   * @param args the startup arguments
+   * @throws Throwable if we error
+   */
+  public static void main(String[] args) throws Throwable {
+
+    final SimpleTest ts = new SimpleTest("This is a test", 2);
+    //noinspection InfiniteLoopStatement
+    for (; ; ) {
+      try {
+        ts.message(ts.newId());
+      } catch (Exception e) {
+        //noinspection CallToPrintStackTrace
+        e.printStackTrace();
+      }
+
+      //noinspection BusyWait
+      Thread.sleep(1000);
+    }
+  }
+}