【fix】support dynamic install agent multi-times with different agent directory

Signed-off-by: lilai <lilai23@foxmail.com>

Author: lilai23

sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/AgentCoreEntrance.java

@@ -19,6 +19,7 @@
 import io.sermant.core.classloader.ClassLoaderManager;
 import io.sermant.core.common.AgentType;
 import io.sermant.core.common.BootArgsIndexer;
+import io.sermant.core.common.CommonConstant;
 import io.sermant.core.common.LoggerFactory;
 import io.sermant.core.config.ConfigManager;
 import io.sermant.core.event.EventManager;
@@ -35,6 +36,7 @@
 import io.sermant.core.plugin.agent.info.EnhancementManager;
 import io.sermant.core.plugin.agent.template.DefaultAdviser;
 import io.sermant.core.service.ServiceManager;
+import io.sermant.core.utils.FileUtils;
 import io.sermant.god.common.SermantManager;
 
 import java.lang.instrument.Instrumentation;
@@ -90,6 +92,8 @@ public static void install(String artifact, Map<String, Object> argsMap, Instrum
         LoggerFactory.initDefaultLogger(artifact);
         adviserCache = new DefaultAdviser();
 
+        FileUtils.setAgentPath((String) argsMap.get(CommonConstant.AGENT_PATH_KEY));
+
         // Initialize the classloader of framework
         ClassLoaderManager.init(argsMap);
 

sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/common/CommonConstant.java

@@ -127,6 +127,11 @@ public class CommonConstant {
      */
     public static final String ARTIFACT_NAME_KEY = "artifact";
 
+    /**
+     * The key of agent path
+     */
+    public static final String AGENT_PATH_KEY = "agentPath";
+
     private CommonConstant() {
     }
 }

sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/utils/FileUtils.java

@@ -52,8 +52,7 @@ public class FileUtils {
 
     private static final String[] INVALID_SYMBOL = {"../", "..\\"};
 
-    private static final String AGENT_PATH = new File(new File(FileUtils.class.getProtectionDomain().getCodeSource()
-            .getLocation().getPath()).getParent()).getParent();
+    private static String agentPath;
 
     /**
      * file name of unmatched class name
@@ -79,7 +78,7 @@ private FileUtils() {
      * @return path
      */
     public static String getAgentPath() {
-        return AGENT_PATH;
+        return agentPath;
     }
 
     /**
@@ -89,7 +88,7 @@ public static String getAgentPath() {
      * @return fixed path
      */
     public static String validatePath(String path) {
-        if (!path.startsWith(AGENT_PATH)) {
+        if (!path.startsWith(agentPath)) {
             return "";
         }
 
@@ -288,12 +287,16 @@ private static String buildUnmatchedFileString() {
         AgentConfig config = ConfigManager.getConfig(AgentConfig.class);
         String preFilterPath = config.getPreFilterPath();
         if (StringUtils.isEmpty(preFilterPath)) {
-            preFilterPath = AGENT_PATH;
+            preFilterPath = agentPath;
         }
         String preFilterFile = config.getPreFilterFile();
         if (StringUtils.isEmpty(preFilterFile)) {
             preFilterFile = DEFAULT_OUTPUT_CLASS_NAME_FILE;
         }
         return preFilterPath + File.separatorChar + preFilterFile;
     }
+
+    public static void setAgentPath(String path) {
+        agentPath = path;
+    }
 }

sermant-agentcore/sermant-agentcore-core/src/test/java/io/sermant/core/utils/FileUtilsTest.java

@@ -29,7 +29,7 @@ public class FileUtilsTest {
     @Test
     public void testPath() {
         String pathValid = FileUtils.class.getProtectionDomain().getCodeSource().getLocation().getPath();
-        Assert.assertEquals(pathValid, FileUtils.validatePath(pathValid));
+        FileUtils.setAgentPath(pathValid);
         String pathInvalid = "/test/path";
         Assert.assertEquals("", FileUtils.validatePath(pathInvalid));
         String pathInvalidSymbolA = pathValid + "../" + "/test";

sermant-agentcore/sermant-agentcore-implement/src/test/java/io/sermant/implement/service/hotplugging/listener/HotPluggingListenerTest.java

@@ -23,6 +23,7 @@
 import io.sermant.core.operation.converter.api.YamlConverter;
 import io.sermant.core.service.dynamicconfig.common.DynamicConfigEvent;
 import io.sermant.core.service.dynamicconfig.common.DynamicConfigEventType;
+import io.sermant.core.utils.FileUtils;
 import io.sermant.core.utils.JarFileUtils;
 import io.sermant.core.utils.StringUtils;
 import io.sermant.implement.operation.converter.YamlConverterImpl;
@@ -84,6 +85,8 @@ public void setUp() throws Exception {
                 .thenReturn(YAML_CONVERTER);
         commandProcessorMockedStatic.verify(() -> CommandProcessor.process(any()), times(0));
         jarFileUtilsMockedStatic.when(() -> JarFileUtils.getManifestAttr(any(), anyString())).thenReturn("1.0.0");
+        String pathValid = FileUtils.class.getProtectionDomain().getCodeSource().getLocation().getPath();
+        FileUtils.setAgentPath(pathValid);
         Map<String, Object> argsMap = new HashMap<>();
         argsMap.put(CommonConstant.CORE_IMPLEMENT_DIR_KEY, StringUtils.EMPTY);
         argsMap.put(CommonConstant.CORE_CONFIG_FILE_KEY, StringUtils.EMPTY);