优化segment文件目录检测，包含version文件的目录无需初始化

elastic-fed/modules/havenask-engine/src/main/java/org/havenask/engine/MetaDataSyncer.java

@@ -39,7 +39,6 @@
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import com.carrotsearch.hppc.cursors.ObjectCursor;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.havenask.cluster.ClusterChangedEvent;
@@ -70,6 +69,8 @@
 import org.havenask.index.Index;
 import org.havenask.threadpool.ThreadPool;
 
+import com.carrotsearch.hppc.cursors.ObjectCursor;
+
 public class MetaDataSyncer extends AbstractLifecycleComponent implements ClusterStateApplier {
     private static final Logger LOGGER = LogManager.getLogger(MetaDataSyncer.class);
     private static final int MAX_SYNC_TIMES = 30;

elastic-fed/modules/havenask-engine/src/main/java/org/havenask/engine/index/config/generator/RuntimeSegmentGenerator.java

@@ -14,21 +14,26 @@
 
 package org.havenask.engine.index.config.generator;
 
-import org.havenask.common.Nullable;
-import org.havenask.common.settings.Settings;
-import org.havenask.engine.index.config.Schema;
-import org.havenask.engine.util.RangeUtil;
-import org.havenask.index.mapper.MapperService;
-import org.havenask.index.shard.ShardId;
-
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.StandardOpenOption;
 import java.util.Locale;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.havenask.common.Nullable;
+import org.havenask.common.settings.Settings;
+import org.havenask.engine.index.config.Schema;
+import org.havenask.engine.util.RangeUtil;
+import org.havenask.engine.util.Utils;
+import org.havenask.index.mapper.MapperService;
+import org.havenask.index.shard.ShardId;
+
 public class RuntimeSegmentGenerator {
+    private static final Logger LOGGER = LogManager.getLogger(RuntimeSegmentGenerator.class);
+
     public static final String VERSION_FILE_NAME = "version.0";
     public static final String VERSION_FILE_CONTENT = "{\n"
         + "\"description\":\n"
@@ -198,10 +203,14 @@ public void generate() throws IOException {
             Files.createDirectories(dataPath);
         }
 
-        if (Files.exists(dataPath.resolve(VERSION_FILE_NAME))) {
+        String versionFile = Utils.getIndexMaxVersion(dataPath);
+
+        if (versionFile != null && false == versionFile.isEmpty()) {
             return;
         }
 
+        LOGGER.info("generate runtime segment for index [{}], partition [{}]", indexName, partitionName);
+
         Files.write(
             dataPath.resolve(VERSION_FILE_NAME),
             VERSION_FILE_CONTENT.getBytes(StandardCharsets.UTF_8),

elastic-fed/modules/havenask-engine/src/test/java/org/havenask/engine/index/config/generator/RuntimeSegmentGeneratorTests.java

@@ -14,20 +14,22 @@
 
 package org.havenask.engine.index.config.generator;
 
-import org.havenask.common.settings.Settings;
-import org.havenask.engine.HavenaskEnginePlugin;
-import org.havenask.index.mapper.MapperService;
-import org.havenask.index.mapper.MapperServiceTestCase;
-import org.havenask.index.shard.ShardId;
-import org.havenask.plugins.Plugin;
+import static java.util.Collections.singletonList;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
 import java.util.Collection;
 import java.util.Locale;
 
-import static java.util.Collections.singletonList;
+import org.havenask.common.settings.Settings;
+import org.havenask.engine.HavenaskEnginePlugin;
+import org.havenask.index.mapper.MapperService;
+import org.havenask.index.mapper.MapperServiceTestCase;
+import org.havenask.index.shard.ShardId;
+import org.havenask.plugins.Plugin;
 
 public class RuntimeSegmentGeneratorTests extends MapperServiceTestCase {
     @Override
@@ -146,4 +148,37 @@ public void testBasic() throws IOException {
         );
     }
 
+    public void testExists() throws IOException {
+        String indexName = randomAlphaOfLength(5);
+        MapperService mapperService = createMapperService(fieldMapping(b -> b.field("type", "keyword")));
+        Path runtimePath = createTempDir();
+        ShardId shardId = new ShardId(indexName, "_na_", 0);
+        RuntimeSegmentGenerator runtimeSegmentGenerator = new RuntimeSegmentGenerator(
+            shardId,
+            1,
+            Settings.EMPTY,
+            mapperService,
+            runtimePath
+        );
+
+        Path dataPath = runtimePath.resolve(indexName).resolve("generation_0").resolve("partition_0_65535");
+        Files.createDirectories(dataPath);
+
+        Files.write(
+            dataPath.resolve("version.1"),
+            RuntimeSegmentGenerator.VERSION_FILE_CONTENT.getBytes(StandardCharsets.UTF_8),
+            StandardOpenOption.CREATE,
+            StandardOpenOption.TRUNCATE_EXISTING
+        );
+
+        runtimeSegmentGenerator.generate();
+
+        assertFalse(Files.exists(dataPath.resolve(RuntimeSegmentGenerator.VERSION_FILE_NAME)));
+        assertFalse(Files.exists(dataPath.resolve(RuntimeSegmentGenerator.INDEX_FORMAT_VERSION_FILE_NAME)));
+        assertFalse(Files.exists(dataPath.resolve(RuntimeSegmentGenerator.INDEX_PARTITION_META_FILE_NAME)));
+        assertFalse(Files.exists(dataPath.resolve(RuntimeSegmentGenerator.SCHEMA_FILE_NAME)));
+        assertFalse(Files.exists(dataPath.resolve(RuntimeSegmentGenerator.DEPLOY_META_FILE_NAME)));
+        assertFalse(Files.exists(dataPath.resolve(RuntimeSegmentGenerator.ENTRY_TABLE_FILE_NAME)));
+    }
+
 }