(camel) branch camel-4.4.x updated: CAMEL-20613: set AbstractCamelContext#endpointStrategies to ConcurrentHashSet to prevent ConcurrentModificationException (#13821)

[davsclaus]

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davsclaus pushed a commit to branch camel-4.4.x
in repository https://gitbox.apache.org/repos/asf/camel.git


The following commit(s) were added to refs/heads/camel-4.4.x by this push:
     new 3ccf5409add CAMEL-20613: set AbstractCamelContext#endpointStrategies 
to ConcurrentHashSet to prevent ConcurrentModificationException (#13821)
3ccf5409add is described below

commit 3ccf5409addca5b7eeb7613a70bd7edd5560c2a2
Author: Bartosz Popiela <bartosz...@gmail.com>
AuthorDate: Thu Apr 18 13:29:07 2024 +0200

    CAMEL-20613: set AbstractCamelContext#endpointStrategies to 
ConcurrentHashSet to prevent ConcurrentModificationException (#13821)
    
    If a thread iterates over the list of strategies while another thread adds 
a new strategy, ConcurrentModificationException is thrown. To fix this issue, 
AbstractCamelContext#endpointStrategies can be set to a thread-safe collection.
---
 .../org/apache/camel/impl/engine/AbstractCamelContext.java |  4 ++--
 .../camel/impl/engine/DefaultCamelContextExtension.java    | 14 ++++++++------
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git 
a/core/camel-base-engine/src/main/java/org/apache/camel/impl/engine/AbstractCamelContext.java
 
b/core/camel-base-engine/src/main/java/org/apache/camel/impl/engine/AbstractCamelContext.java
index c1aed60c68a..062b07914bf 100644
--- 
a/core/camel-base-engine/src/main/java/org/apache/camel/impl/engine/AbstractCamelContext.java
+++ 
b/core/camel-base-engine/src/main/java/org/apache/camel/impl/engine/AbstractCamelContext.java
@@ -206,7 +206,7 @@ public abstract class AbstractCamelContext extends 
BaseService
 
     private final DefaultCamelContextExtension camelContextExtension = new 
DefaultCamelContextExtension(this);
     private final AtomicInteger endpointKeyCounter = new AtomicInteger();
-    private final List<EndpointStrategy> endpointStrategies = new 
ArrayList<>();
+    private final Set<EndpointStrategy> endpointStrategies = 
ConcurrentHashMap.newKeySet();
     private final GlobalEndpointConfiguration globalEndpointConfiguration = 
new DefaultGlobalEndpointConfiguration();
     private final Map<String, Component> components = new 
ConcurrentHashMap<>();
     private final Set<Route> routes = new LinkedHashSet<>();
@@ -4203,7 +4203,7 @@ public abstract class AbstractCamelContext extends 
BaseService
         return camelContextExtension.getRegistry();
     }
 
-    List<EndpointStrategy> getEndpointStrategies() {
+    Set<EndpointStrategy> getEndpointStrategies() {
         return endpointStrategies;
     }
 
diff --git 
a/core/camel-base-engine/src/main/java/org/apache/camel/impl/engine/DefaultCamelContextExtension.java
 
b/core/camel-base-engine/src/main/java/org/apache/camel/impl/engine/DefaultCamelContextExtension.java
index a5efe918e62..a117db7b378 100644
--- 
a/core/camel-base-engine/src/main/java/org/apache/camel/impl/engine/DefaultCamelContextExtension.java
+++ 
b/core/camel-base-engine/src/main/java/org/apache/camel/impl/engine/DefaultCamelContextExtension.java
@@ -258,15 +258,17 @@ class DefaultCamelContextExtension implements 
ExtendedCamelContext {
 
     @Override
     public void registerEndpointCallback(EndpointStrategy strategy) {
-        if (!camelContext.getEndpointStrategies().contains(strategy)) {
-            // let it be invoked for already registered endpoints so it can
-            // catch-up.
-            camelContext.getEndpointStrategies().add(strategy);
+        // let it be invoked for already registered endpoints so it can
+        // catch-up.
+        if (camelContext.getEndpointStrategies().add(strategy)) {
             for (Endpoint endpoint : camelContext.getEndpoints()) {
-                Endpoint newEndpoint = 
strategy.registerEndpoint(endpoint.getEndpointUri(), endpoint);
+                Endpoint newEndpoint = 
strategy.registerEndpoint(endpoint.getEndpointUri(),
+                        endpoint);
                 if (newEndpoint != null) {
                     // put will replace existing endpoint with the new endpoint
-                    
camelContext.getEndpointRegistry().put(camelContext.getEndpointKey(endpoint.getEndpointUri()),
 newEndpoint);
+                    camelContext.getEndpointRegistry()
+                            
.put(camelContext.getEndpointKey(endpoint.getEndpointUri()),
+                                    newEndpoint);
                 }
             }
         }