fix: suppress DoubleBraceInitialization

Author: xuhongxu96

broker/src/main/java/org/apache/rocketmq/broker/metrics/BrokerMetricsManager.java

@@ -162,6 +162,7 @@ public class BrokerMetricsManager {
     public static LongCounter rollBackMessagesTotal = new NopLongCounter();
     public static LongHistogram transactionFinishLatency = new NopLongHistogram();
 
+    @SuppressWarnings("DoubleBraceInitialization")
     public static final List<String> SYSTEM_GROUP_PREFIX_LIST = new ArrayList<String>() {
         {
             add(MixAll.CID_RMQ_SYS_PREFIX.toLowerCase());

broker/src/test/java/org/apache/rocketmq/broker/offset/ConsumerOffsetManagerTest.java

@@ -40,6 +40,7 @@ public class ConsumerOffsetManagerTest {
     private ConsumerOffsetManager consumerOffsetManager;
 
     @Before
+    @SuppressWarnings("DoubleBraceInitialization")
     public void init() {
         brokerController = Mockito.mock(BrokerController.class);
         consumerOffsetManager = new ConsumerOffsetManager(brokerController);

broker/src/test/java/org/apache/rocketmq/broker/offset/RocksDBConsumerOffsetManagerTest.java

@@ -41,6 +41,7 @@ public class RocksDBConsumerOffsetManagerTest {
     private ConsumerOffsetManager consumerOffsetManager;
 
     @Before
+    @SuppressWarnings("DoubleBraceInitialization")
     public void init() {
         if (notToBeExecuted()) {
             return;

proxy/src/main/java/org/apache/rocketmq/proxy/grpc/interceptor/RequestMapping.java

@@ -33,6 +33,7 @@
 import org.apache.rocketmq.remoting.protocol.RequestCode;
 
 public class RequestMapping {
+    @SuppressWarnings("DoubleBraceInitialization")
     private final static Map<String, Integer> REQUEST_MAP = new HashMap<String, Integer>() {
         {
             // v2

proxy/src/main/java/org/apache/rocketmq/proxy/remoting/activity/AbstractRemotingActivity.java

@@ -45,6 +45,7 @@ public abstract class AbstractRemotingActivity implements NettyRequestProcessor
     protected final MessagingProcessor messagingProcessor;
     protected static final String BROKER_NAME_FIELD = "bname";
     protected static final String BROKER_NAME_FIELD_FOR_SEND_MESSAGE_V2 = "n";
+    @SuppressWarnings("DoubleBraceInitialization")
     private static final Map<ProxyExceptionCode, Integer> PROXY_EXCEPTION_RESPONSE_CODE_MAP = new HashMap<ProxyExceptionCode, Integer>() {
         {
             put(ProxyExceptionCode.FORBIDDEN, ResponseCode.NO_PERMISSION);

remoting/src/main/java/org/apache/rocketmq/remoting/common/RemotingHelper.java

@@ -45,6 +45,7 @@
 import org.apache.rocketmq.remoting.protocol.RequestCode;
 import org.apache.rocketmq.remoting.protocol.ResponseCode;
 
+@SuppressWarnings("DoubleBraceInitialization")
 public class RemotingHelper {
     public static final String DEFAULT_CHARSET = "UTF-8";
     public static final String DEFAULT_CIDR_ALL = "0.0.0.0/0";

store/src/main/java/org/apache/rocketmq/store/timer/TimerMetrics.java

@@ -62,6 +62,7 @@ public class TimerMetrics extends ConfigManager {
     private final ConcurrentMap<Integer, Metric> timingDistribution =
             new ConcurrentHashMap<>(1024);
 
+    @SuppressWarnings("DoubleBraceInitialization")
     public List<Integer> timerDist = new ArrayList<Integer>() {{
             add(5);
             add(60);

store/src/test/java/org/apache/rocketmq/store/ha/autoswitch/AutoSwitchHATest.java

@@ -454,6 +454,7 @@ public void testAddBrokerAndSyncFromLastFile() throws Exception {
     }
 
     @Test
+    @SuppressWarnings("DoubleBraceInitialization")
     public void testCheckSynchronizingSyncStateSetFlag() throws Exception {
         // Step1: broker1 as leader, broker2 as follower
         init(defaultMappedFileSize);

store/src/test/java/org/apache/rocketmq/store/timer/TimerMetricsTest.java

@@ -57,6 +57,7 @@ public void testTimingCount() {
     }
 
     @Test
+    @SuppressWarnings("DoubleBraceInitialization")
     public void testTimingDistribution() {
         String baseDir = StoreTestUtils.createBaseDir();
         TimerMetrics first = new TimerMetrics(baseDir);

tieredstore/src/test/java/org/apache/rocketmq/tieredstore/util/MessageStoreUtilTest.java

@@ -48,6 +48,7 @@ public static void deleteStoreDirectory(String storePath) {
     }
 
     @Test
+    @SuppressWarnings("DoubleBraceInitialization")
     public void toHumanReadableTest() {
         Map<Long, String> capacityTable = new HashMap<Long, String>() {
             {