Add SilencedGelfTcpAppender to silence GELF connection issues (#17)

Author: rammrain

.github/workflows/build.yml

@@ -11,27 +11,30 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
+
       - name: Setup Java
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 17
+
       - name: Setup Gradle
-        uses: gradle/gradle-build-action@v2
-        with:
-          gradle-version: 8.4
+        uses: gradle/actions/setup-gradle@v3
+
       - name: Run tests and generate reports
         run: ./gradlew testAndReport
+
       - name: Run Sonar analysis
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
         run: ./gradlew sonar -x test --no-watch-fs
+
       - name: Upload Artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: report
           path: build/reports/**
@@ -41,19 +44,21 @@ jobs:
     runs-on: ubuntu-latest
     needs: [test]
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-java@v3
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 17
+
       - name: Setup Gradle
-        uses: gradle/gradle-build-action@v2
-        with:
-          gradle-version: 8.4
+        uses: gradle/actions/setup-gradle@v3
+
       - name: Run build with Gradle Wrapper
         run: ./gradlew build -x test
+
       - name: Upload Artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: jar
           path: build/libs/**

Dockerfile

@@ -10,7 +10,7 @@ Library providing basic generic functionality required by any HTTP web service.
 
 ```
 // https://mvnrepository.com/artifact/ee.bitweb/spring-core
-implementation group: 'ee.bitweb', name: 'spring-core', version: '3.1.0'
+implementation group: 'ee.bitweb', name: 'spring-core', version: '3.2.0'
 ```
 
 Review available versions in [Maven Central](https://mvnrepository.com/artifact/ee.bitweb/spring-core).

README.md

@@ -19,7 +19,7 @@ plugins {
 }
 
 group 'ee.bitweb'
-version '3.1.0'
+version '3.2.0'
 java {
     sourceCompatibility = '17'
 }
@@ -79,6 +79,9 @@ dependencies {
     // https://mvnrepository.com/artifact/com.squareup.okhttp3/logging-interceptor
     compileOnly group: 'com.squareup.okhttp3', name: 'logging-interceptor', version: '4.12.0'
 
+    // https://mvnrepository.com/artifact/de.siegmar/logback-gelf
+    compileOnly group: 'de.siegmar', name: 'logback-gelf', version: '6.0.1'
+
     // https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web
     testImplementation group: 'org.springframework.boot', name: 'spring-boot-starter-web', version: "${springBootVersion}"
 

build.gradle

@@ -1 +1,2 @@
 systemProp.org.gradle.internal.publish.checksums.insecure=true
+org.gradle.welcome=never

gradle.properties

@@ -0,0 +1,36 @@
+package ee.bitweb.core.logging;
+
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import de.siegmar.logbackgelf.GelfTcpAppender;
+import ee.bitweb.core.exception.CoreException;
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class SilencedGelfTcpAppender extends GelfTcpAppender {
+
+    @Override
+    protected void append(final ILoggingEvent event) {
+        final byte[] binMessage = getEncoder().encode(event);
+
+        try {
+            appendMessage(binMessage);
+        } catch (CoreException ignored) {
+            // Catching and ignoring CoreException which will be thrown if application can't connect to Graylog, because we don't want the application
+            // to stop.
+        }
+    }
+
+    @Override
+    protected void appendMessage(final byte[] messageToSend) {
+        try {
+            super.appendMessage(messageToSend);
+        } catch (CoreException e) {
+            throw new CoreException("Error sending GELF message", e);
+        }
+    }
+
+    @Override
+    public void addError(String msg, Throwable ex) {
+        throw new CoreException(msg, ex);
+    }
+}