switch to autoconfig

Author: hussainkarafallah

tw-context-starter/build.gradle

@@ -7,6 +7,7 @@ apply from: '../build.common.gradle'
 dependencies {
     implementation libraries.springBootAutoconfigure
     implementation libraries.twBaseUtils
+    implementation libraries.micrometerContextPropagation
     api project(":tw-context:")
 
     testImplementation libraries.springBootStarterTest

tw-context-starter/src/main/java/com/transferwise/common/context/TwContextAutoConfiguration.java

@@ -12,6 +12,10 @@
 @Configuration
 public class TwContextAutoConfiguration {
 
+  TwContextAutoConfiguration() {
+    ContextRegistry.getInstance().registerThreadLocalAccessor(new TwContextThreadLocalAccessor());
+  }
+
   @Bean
   @ConditionalOnMissingBean
   public UnitOfWorkManager twContextUnitOfWorkManager(IMeterCache meterCache) {

tw-context/src/main/java/com/transferwise/common/context/TwContext.java

@@ -3,7 +3,6 @@
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.util.concurrent.RateLimiter;
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
-import io.micrometer.context.ContextRegistry;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
@@ -40,10 +39,6 @@ public class TwContext {
 
   static final TwContext ROOT_CONTEXT = new TwContext(null, true);
 
-  static {
-    ContextRegistry.getInstance().registerThreadLocalAccessor(new TwContextThreadLocalAccessor());
-  }
-
   public static TwContext current() {
     Optional<TwContext> twContext = contextTl.get();
     return twContext == null || !twContext.isPresent() ? ROOT_CONTEXT : twContext.get();