Use slf4j logging facade.

Author: kishorenc

.gitignore

@@ -2,4 +2,5 @@
 .idea/
 **/build
 .out/
-**/books.jsonl
+**/books.jsonl
+config.json

CONTRIBUTING.md

@@ -22,7 +22,10 @@ Before making a PR to this repository look out for the following guidelines.
   ```
 - Run the following command:
   ```bash
-  java -jar swagger-codegen-cli-3.0.20.jar generate -i <path-to-spec> -l jaxrs-cxf-client -c <path-to-config.json> -o <out-dir>
+  java --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.net=ALL-UNNAMED \
+  --add-opens java.base/java.lang.reflect=ALL-UNNAMED --add-opens java.base/java.text=ALL-UNNAMED \
+  --add-opens java.desktop/java.awt.font=ALL-UNNAMED -jar ~/apps/swagger-codegen-cli-3.0.20.jar generate \
+  -i /path/to/typesense-api-spec/openapi.yml -l jaxrs-cxf-client -c config.json -o /tmp/model
   ```
 - Now, copy the content under ```<out-dir>/src/gen/java/org/typesense/model``` and replace it with the content of the ```typesense-java/src/main/java/org/typesense/model``` folder in the `typesense-java` client repository.
 - And then make the necessary changes in `api` folder.

build.gradle

@@ -60,9 +60,10 @@ dependencies {
     implementation "javax.xml.bind:jaxb-api:2.3.1"
     implementation "com.fasterxml.jackson.core:jackson-databind:2.14.1"
     implementation "io.swagger.core.v3:swagger-annotations:2.0.0"
-    implementation "org.apache.logging.log4j:log4j-core:2.19.0"
+    implementation "org.slf4j:slf4j-api:2.0.5"
     implementation "com.squareup.okhttp3:okhttp:4.9.1"
 
+    testImplementation "org.slf4j:slf4j-simple:2.0.5"
     testImplementation "junit:junit:4.12"
     testImplementation "org.hamcrest:hamcrest-all:1.3"
     integrationTestImplementation "junit:junit:4.12"

src/main/java/org/typesense/api/ApiCall.java

@@ -4,8 +4,8 @@
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import okhttp3.*;
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.typesense.api.exceptions.*;
 import org.typesense.model.ErrorResponse;
 import org.typesense.resources.Node;
@@ -30,7 +30,7 @@ public class ApiCall {
     private static int nodeIndex = 0;
 
     private static final String API_KEY_HEADER = "X-TYPESENSE-API-KEY";
-    private static final Logger logger = LogManager.getLogger(ApiCall.class);
+    private static final Logger logger = LoggerFactory.getLogger(ApiCall.class);
     private final OkHttpClient client;
     private final String apiKey;
     private final Duration retryInterval;
@@ -150,7 +150,6 @@ <Q, R> R delete(String endpoint, Q queryParameters, Class<R> responseClass) thro
     <Q, T> T makeRequest(String endpoint, Q queryParameters, Request.Builder requestBuilder,
                          Class<T> responseClass) throws Exception {
         int num_tries = 0;
-        Logger logger = LogManager.getLogger(ApiCall.class);
         Exception lastException = new TypesenseError("Unknown client error", 400);
 
         while (num_tries < this.configuration.numRetries) {
@@ -193,12 +192,14 @@ <Q, T> T makeRequest(String endpoint, Q queryParameters, Request.Builder request
 
                 this.setNodeHealthStatus(node, false);
                 lastException = e;
-                logger.trace("Request to " + node.host + " failed because: " + e.getMessage());
-                logger.trace("Sleeping for " + this.retryInterval.getSeconds() + "s and then retrying request");
+
+                logger.debug("Request to " + node.host + " failed because: " + e.getMessage());
+                logger.debug("Sleeping for " + this.retryInterval.getSeconds() + "s and then retrying request");
+
                 try {
                     Thread.sleep(this.retryInterval.getSeconds() * 1000);
-                } catch (InterruptedException interruptedException) {
-                    logger.error("Error while sleeping.", interruptedException);
+                } catch (InterruptedException ignored) {
+
                 }
             }
         }