Avoid register more times for SPI (#5618)

3a518603 · Liang Zhang · GitHub · 42496af5 · 3a518603
隐藏空白更改
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shardingsphere-spi/src/main/java/org/apache/shardingsphere/sharding/spi/ShardingSphereServiceLoader.java ...rdingsphere/sharding/spi/ShardingSphereServiceLoader.java +3 -0

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--- a/shardingsphere-spi/src/main/java/org/apache/shardingsphere/sharding/spi/ShardingSphereServiceLoader.java
+++ b/shardingsphere-spi/src/main/java/org/apache/shardingsphere/sharding/spi/ShardingSphereServiceLoader.java
@@ -44,6 +44,9 @@ public final class ShardingSphereServiceLoader {
     * @param <T> type of service
     */
    public static <T> void register(final Class<T> service) {
+        if (SERVICE_MAP.containsKey(service)) {
+            return;
+        }
        for (T each : ServiceLoader.load(service)) {
            registerServiceClass(service, each);
        }