[geode] 01/05: GEODE-6183: Make isAttachAPIFound load providers

[kl...@apache.org]

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klund pushed a commit to branch develop
in repository https://gitbox.apache.org/repos/asf/geode.git

commit f074ca72ae9a8e76066c3ccd7ba74499ceec1743
Author: Kirk Lund <kl...@apache.org>
AuthorDate: Thu May 30 11:17:49 2019 -0700

    GEODE-6183: Make isAttachAPIFound load providers
    
    VirtualMachine class can be loaded even if AttachProvider service
    providers are not found. This change forces loading of providers
    for isAttachAPIFound.
    
    Co-authored-by: Michael Oleske <mo...@pivotal.io>
---
 .../geode/internal/process/ProcessControllerFactory.java   | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/geode-core/src/main/java/org/apache/geode/internal/process/ProcessControllerFactory.java b/geode-core/src/main/java/org/apache/geode/internal/process/ProcessControllerFactory.java
index 3911a08..93a8238 100755
--- a/geode-core/src/main/java/org/apache/geode/internal/process/ProcessControllerFactory.java
+++ b/geode-core/src/main/java/org/apache/geode/internal/process/ProcessControllerFactory.java
@@ -20,6 +20,9 @@ import static org.apache.commons.lang3.Validate.notNull;
 
 import java.io.File;
 import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.ServiceConfigurationError;
 import java.util.concurrent.TimeoutException;
 
 import org.apache.geode.distributed.internal.DistributionConfig;
@@ -72,9 +75,14 @@ public class ProcessControllerFactory {
     }
     boolean found = false;
     try {
-      final Class<?> virtualMachineClass = Class.forName("com.sun.tools.attach.VirtualMachine");
-      found = virtualMachineClass != null;
-    } catch (ClassNotFoundException ignore) {
+      final Class<?> virtualMachineClass = Class.forName("com.sun.tools.attach.spi.AttachProvider");
+      if (virtualMachineClass != null) {
+        Method providersMethod = virtualMachineClass.getMethod("providers");
+        providersMethod.invoke(virtualMachineClass);
+        found = true;
+      }
+    } catch (ClassNotFoundException | IllegalAccessException | InvocationTargetException
+        | NoSuchMethodException | ServiceConfigurationError ignore) {
     }
     return found;
   }