java: add configurable volume access mode

other/java/client/src/main/java/seaweedfs/client/FileChunkManifest.java

@@ -74,7 +74,7 @@ public class FileChunkManifest {
         byte[] chunkData = SeaweedRead.chunkCache.getChunk(chunkView.fileId);
         if (chunkData == null) {
             LOG.debug("doFetchFullChunkData:{}", chunkView);
-            chunkData = SeaweedRead.doFetchFullChunkData(chunkView, locations);
+            chunkData = SeaweedRead.doFetchFullChunkData(filerGrpcClient, chunkView, locations);
         }
         if (chunk.getIsChunkManifest()){
             LOG.debug("chunk {} size {}", chunkView.fileId, chunkData.length);

other/java/client/src/main/java/seaweedfs/client/FilerGrpcClient.java

@@ -15,6 +15,10 @@ import java.util.concurrent.TimeUnit;
 
 public class FilerGrpcClient {
 
+    public final int VOLUME_SERVER_ACCESS_DIRECT = 0;
+    public final int VOLUME_SERVER_ACCESS_PUBLIC_URL = 1;
+    public final int VOLUME_SERVER_ACCESS_FILER_PROXY = 2;
+
     private static final Logger logger = LoggerFactory.getLogger(FilerGrpcClient.class);
     static SslContext sslContext;
 
@@ -34,6 +38,8 @@ public class FilerGrpcClient {
     private boolean cipher = false;
     private String collection = "";
     private String replication = "";
+    private int volumeServerAccess = VOLUME_SERVER_ACCESS_DIRECT;
+    private String filerAddress;
 
     public FilerGrpcClient(String host, int grpcPort) {
         this(host, grpcPort, sslContext);
@@ -49,6 +55,8 @@ public class FilerGrpcClient {
                         .negotiationType(NegotiationType.TLS)
                         .sslContext(sslContext));
 
+        filerAddress = String.format("%s:%d", host, grpcPort-10000);
+
         FilerProto.GetFilerConfigurationResponse filerConfigurationResponse =
                 this.getBlockingStub().getFilerConfiguration(
                         FilerProto.GetFilerConfigurationRequest.newBuilder().build());
@@ -58,7 +66,7 @@ public class FilerGrpcClient {
 
     }
 
-    public FilerGrpcClient(ManagedChannelBuilder<?> channelBuilder) {
+    private FilerGrpcClient(ManagedChannelBuilder<?> channelBuilder) {
         channel = channelBuilder.build();
         blockingStub = SeaweedFilerGrpc.newBlockingStub(channel);
         asyncStub = SeaweedFilerGrpc.newStub(channel);
@@ -93,4 +101,26 @@ public class FilerGrpcClient {
         return futureStub;
     }
 
+    public void setAccessVolumeServerDirectly() {
+        this.volumeServerAccess = VOLUME_SERVER_ACCESS_DIRECT;
+    }
+    public boolean isAccessVolumeServerDirectly() {
+        return this.volumeServerAccess == VOLUME_SERVER_ACCESS_DIRECT;
+    }
+    public void setAccessVolumeServerByPublicUrl() {
+        this.volumeServerAccess = VOLUME_SERVER_ACCESS_PUBLIC_URL;
+    }
+    public boolean isAccessVolumeServerByPublicUrl() {
+        return this.volumeServerAccess == VOLUME_SERVER_ACCESS_PUBLIC_URL;
+    }
+    public void setAccessVolumeServerByFilerProxy() {
+        this.volumeServerAccess = VOLUME_SERVER_ACCESS_FILER_PROXY;
+    }
+    public boolean isAccessVolumeServerByFilerProxy() {
+        return this.volumeServerAccess == VOLUME_SERVER_ACCESS_FILER_PROXY;
+    }
+    public String getFilerAddress() {
+        return this.filerAddress;
+    }
+
 }

other/java/client/src/main/java/seaweedfs/client/SeaweedRead.java

@@ -71,7 +71,7 @@ public class SeaweedRead {
                 return 0;
             }
 
-            int len = readChunkView(startOffset, buf, chunkView, locations);
+            int len = readChunkView(filerGrpcClient, startOffset, buf, chunkView, locations);
 
             LOG.debug("read [{},{}) {} size {}", startOffset, startOffset + len, chunkView.fileId, chunkView.size);
 
@@ -93,12 +93,12 @@ public class SeaweedRead {
         return readCount;
     }
 
-    private static int readChunkView(long startOffset, ByteBuffer buf, ChunkView chunkView, FilerProto.Locations locations) throws IOException {
+    private static int readChunkView(FilerGrpcClient filerGrpcClient, long startOffset, ByteBuffer buf, ChunkView chunkView, FilerProto.Locations locations) throws IOException {
 
         byte[] chunkData = chunkCache.getChunk(chunkView.fileId);
 
         if (chunkData == null) {
-            chunkData = doFetchFullChunkData(chunkView, locations);
+            chunkData = doFetchFullChunkData(filerGrpcClient, chunkView, locations);
             chunkCache.setChunk(chunkView.fileId, chunkData);
         }
 
@@ -110,12 +110,18 @@ public class SeaweedRead {
         return len;
     }
 
-    public static byte[] doFetchFullChunkData(ChunkView chunkView, FilerProto.Locations locations) throws IOException {
+    public static byte[] doFetchFullChunkData(FilerGrpcClient filerGrpcClient, ChunkView chunkView, FilerProto.Locations locations) throws IOException {
 
         byte[] data = null;
         IOException lastException = null;
         for (long waitTime = 1000L; waitTime < 10 * 1000; waitTime += waitTime / 2) {
             for (FilerProto.Location location : locations.getLocationsList()) {
+                String host = location.getUrl();
+                if (filerGrpcClient.isAccessVolumeServerByPublicUrl()) {
+                    host = location.getPublicUrl();
+                } else if (filerGrpcClient.isAccessVolumeServerByFilerProxy()) {
+                    host = filerGrpcClient.getFilerAddress();
+                }
                 String url = String.format("http://%s/%s", location.getUrl(), chunkView.fileId);
                 try {
                     data = doFetchOneFullChunkData(chunkView, url);
@@ -145,7 +151,7 @@ public class SeaweedRead {
 
     }
 
-    public static byte[] doFetchOneFullChunkData(ChunkView chunkView, String url) throws IOException {
+    private static byte[] doFetchOneFullChunkData(ChunkView chunkView, String url) throws IOException {
 
         HttpGet request = new HttpGet(url);
 

other/java/client/src/main/java/seaweedfs/client/SeaweedWrite.java

@@ -51,9 +51,15 @@ public class SeaweedWrite {
                         .setPath(path)
                         .build());
         String fileId = response.getFileId();
-        String url = response.getUrl();
         String auth = response.getAuth();
-        String targetUrl = String.format("http://%s/%s", url, fileId);
+
+        String host = response.getUrl();
+        if (filerGrpcClient.isAccessVolumeServerByPublicUrl()) {
+            host = response.getPublicUrl();
+        } else if (filerGrpcClient.isAccessVolumeServerByFilerProxy()) {
+            host = filerGrpcClient.getFilerAddress();
+        }
+        String targetUrl = String.format("http://%s/%s", host, fileId);
 
         ByteString cipherKeyString = com.google.protobuf.ByteString.EMPTY;
         byte[] cipherKey = null;

other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedFileSystem.java

@@ -26,6 +26,7 @@ public class SeaweedFileSystem extends FileSystem {
     public static final int FS_SEAWEED_DEFAULT_PORT = 8888;
     public static final String FS_SEAWEED_BUFFER_SIZE = "fs.seaweed.buffer.size";
     public static final String FS_SEAWEED_REPLICATION = "fs.seaweed.replication";
+    public static final String FS_SEAWEED_VOLUME_SERVER_ACCESS = "fs.seaweed.volumeServerAccess";
     public static final int FS_SEAWEED_DEFAULT_BUFFER_SIZE = 4 * 1024 * 1024;
 
     private static final Logger LOG = LoggerFactory.getLogger(SeaweedFileSystem.class);

other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedFileSystemStore.java

@@ -18,8 +18,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
-import static seaweed.hdfs.SeaweedFileSystem.FS_SEAWEED_BUFFER_SIZE;
-import static seaweed.hdfs.SeaweedFileSystem.FS_SEAWEED_DEFAULT_BUFFER_SIZE;
+import static seaweed.hdfs.SeaweedFileSystem.*;
 
 public class SeaweedFileSystemStore {
 
@@ -34,6 +33,13 @@ public class SeaweedFileSystemStore {
         filerGrpcClient = new FilerGrpcClient(host, grpcPort);
         filerClient = new FilerClient(filerGrpcClient);
         this.conf = conf;
+        String volumeServerAccessMode = this.conf.get(FS_SEAWEED_VOLUME_SERVER_ACCESS, "direct");
+        if (volumeServerAccessMode.equals("publicUrl")) {
+            filerGrpcClient.setAccessVolumeServerByPublicUrl();
+        } else if (volumeServerAccessMode.equals("filerProxy")) {
+            filerGrpcClient.setAccessVolumeServerByFilerProxy();
+        }
+
     }
 
     public void close() {