fix

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

Author: zeitlinger

prometheus-metrics-exporter-common/src/main/java/io/prometheus/metrics/exporter/common/PrometheusHttpRequest.java

@@ -43,6 +43,8 @@ default String getParameter(String name) {
   /** See {@code jakarta.servlet.ServletRequest.getParameterValues(String)} */
   @Override
   @Nullable
+  // decode with Charset is only available in Java 10+, but we want to support Java 8
+  @SuppressWarnings("JdkObsolete")
   default String[] getParameterValues(String name) {
     try {
       ArrayList<String> result = new ArrayList<>();

prometheus-metrics-exporter-pushgateway/src/main/java/io/prometheus/metrics/exporter/pushgateway/PushGateway.java

@@ -253,6 +253,8 @@ private void doRequest(@Nullable PrometheusRegistry registry, String method) thr
     }
   }
 
+  // toString with Charset is only available in Java 10+, but we want to support Java 8
+  @SuppressWarnings("JdkObsolete")
   private static String readFromStream(InputStream is) throws IOException {
     ByteArrayOutputStream result = new ByteArrayOutputStream();
     byte[] buffer = new byte[1024];
@@ -497,6 +499,8 @@ private Format getFormat() {
       return Format.PROMETHEUS_PROTOBUF;
     }
 
+    // encode with Charset is only available in Java 10+, but we want to support Java 8
+    @SuppressWarnings("JdkObsolete")
     private URL makeUrl(@Nullable ExporterPushgatewayProperties properties)
         throws UnsupportedEncodingException, MalformedURLException {
       StringBuilder url =

prometheus-metrics-exposition-textformats/src/main/java/io/prometheus/metrics/expositionformats/ExpositionFormatWriter.java

@@ -20,6 +20,8 @@ default void write(OutputStream out, MetricSnapshots metricSnapshots) throws IOE
   }
 
   /** Converts the metric snapshots to a debug string using the specified escaping scheme. */
+  // toString with Charset is only available in Java 10+, but we want to support Java 8
+  @SuppressWarnings("JdkObsolete")
   default String toDebugString(MetricSnapshots metricSnapshots, EscapingScheme escapingScheme) {
     ByteArrayOutputStream out = new ByteArrayOutputStream();
     try {