update to slf4j, remove DynamicLog (#2384)

java/runtime-common/src/main/java/org/ray/core/RayRuntime.java

@@ -1,6 +1,5 @@
 package org.ray.core;
 
-import java.io.Serializable;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 import java.util.ArrayList;
@@ -29,8 +28,6 @@ import org.ray.spi.PathConfig;
 import org.ray.spi.RemoteFunctionManager;
 import org.ray.util.config.ConfigReader;
 import org.ray.util.exception.TaskExecutionException;
-import org.ray.util.logger.DynamicLog;
-import org.ray.util.logger.DynamicLogManager;
 import org.ray.util.logger.RayLog;
 
 /**
@@ -80,12 +77,11 @@ public abstract class RayRuntime implements RayApi {
         }
       }
       configReader = new ConfigReader(configPath, updateConfigStr);
-
-      String loglevel = configReader.getStringValue("ray.java", "log_level", "debug",
-          "set the log output level(debug, info, warn, error)");
-      DynamicLog.setLogLevel(loglevel);
       RayRuntime.params = new RayParameters(configReader);
-      DynamicLogManager.init(params.max_java_log_file_num, params.max_java_log_file_size);
+
+      RayLog.init(params.working_directory);
+      assert RayLog.core != null;
+
       ins = instantiate(params);
       assert (ins != null);
 

java/runtime-common/src/main/java/org/ray/core/model/RayParameters.java

@@ -49,9 +49,6 @@ public class RayParameters {
   @AConfig(comment = "working directory")
   public String working_directory = "./run";
 
-  @AConfig(comment = "directory for saving logs")
-  public String logging_directory = "./run/logs";
-
   @AConfig(comment = "primary redis port")
   public int redis_port = 34222;
 
@@ -109,16 +106,9 @@ public class RayParameters {
   @AConfig(comment = "whether to use supreme failover strategy")
   public boolean supremeFO = false;
 
-  @AConfig(comment = "the max num of java log of each java worker")
-  public int max_java_log_file_num = 10;
-
   @AConfig(comment = "whether to disable process failover")
   public boolean disable_process_failover = false;
 
-  @AConfig(comment = "the max size of each file of java worker log, could be set as 10KB, 10MB, "
-      + "1GB or something similar")
-  public String max_java_log_file_size = "500MB";
-
   @AConfig(comment = "delay seconds under onebox before app logic for debugging")
   public int onebox_delay_seconds_before_run_app_logic = 0;