Add freely configurable exporters for generic CF service bindings

META-INF/services/io.opentelemetry.sdk.autoconfigure.spi.logs.ConfigurableLogRecordExporterProvider

@@ -0,0 +1,2 @@
+com.sap.hcf.cf.logging.opentelemetry.agent.ext.exporter.CloudLoggingLogsExporterProvider
+com.sap.hcf.cf.logging.opentelemetry.agent.ext.exporter.VcapServiceLogsExporterProvider

cf-java-logging-support-opentelemetry-agent-extension/src/main/java/com/sap/hcf/cf/logging/opentelemetry/agent/ext/binding/CloudFoundryCredentials.java

@@ -1,5 +1,6 @@
 package com.sap.hcf.cf.logging.opentelemetry.agent.ext.binding;
 
+import java.nio.charset.StandardCharsets;
 import java.util.Map;
 import java.util.TreeMap;
 
@@ -12,7 +13,12 @@ private CloudFoundryCredentials(Builder builder) {
     }
 
     public String getString(String key) {
-        return properties.get(key);
+        return key == null ? null : properties.get(key);
+    }
+
+    public byte[] getPEMBytes(String key) {
+        String raw = getString(key);
+        return raw == null ? null : raw.trim().replace("\\n", "\n").getBytes(StandardCharsets.UTF_8);
     }
 
     public static Builder builder() {

cf-java-logging-support-opentelemetry-agent-extension/src/main/java/com/sap/hcf/cf/logging/opentelemetry/agent/ext/binding/CloudFoundryServicesAdapter.java

@@ -40,8 +40,7 @@ public CloudFoundryServicesAdapter() {
 
     /**
      * Stream CfServices, that match the provided properties. Empty or null values are interpreted as not applicable. No
-     * check will be performed during search. User-provided service instances will be preferred unless the
-     * {@code userProvidedLabel is null or empty. Provided only null values will return all service instances.
+     * check will be performed during search. Provided only null values will return all service instances.
      *
      * @param serviceLabels
      *         the labels of services
@@ -50,6 +49,23 @@ public CloudFoundryServicesAdapter() {
      * @return a stream of service instances present in the CloudFoundry environment variable VCAP_SERVICES
      */
     Stream<CloudFoundryServiceInstance> stream(List<String> serviceLabels, List<String> serviceTags) {
+        return stream(serviceLabels, serviceTags, null);
+    }
+
+    /**
+     * Stream CfServices, that match the provided properties. Empty or null values are interpreted as not applicable. No
+     * check will be performed during search. Provided only null values will return all service instances.
+     *
+     * @param serviceLabels
+     *         the labels of services
+     * @param serviceTags
+     *         the tags of services
+     * @param serviceName
+     *         the name of the service
+     * @return a stream of service instances present in the CloudFoundry environment variable VCAP_SERVICES
+     */
+    Stream<CloudFoundryServiceInstance> stream(List<String> serviceLabels, List<String> serviceTags,
+                                               String serviceName) {
         if (vcapServicesJson == null) {
             LOG.info("No environment variable " + VCAP_SERVICES + " found. Skipping service binding detection.");
             return Stream.empty();
@@ -62,7 +78,8 @@ Stream<CloudFoundryServiceInstance> stream(List<String> serviceLabels, List<Stri
                 if (isNullOrEmpty(serviceLabels) || serviceLabels.contains(label)) {
                     parseServiceInstances(parser, label, serviceInstance -> {
                         if (serviceInstance.getName() != null) {
-                            if (hasServiceTag(serviceTags, serviceInstance.getTags())) {
+                            if (hasServiceName(serviceName, serviceInstance.getName()) && hasServiceTag(serviceTags,
+                                                                                                        serviceInstance.getTags())) {
                                 services.add(serviceInstance);
                             }
                         }
@@ -168,6 +185,10 @@ private boolean hasServiceTag(List<String> requiredTags, List<String> instanceTa
         return instanceTags.containsAll(requiredTags);
     }
 
+    private boolean hasServiceName(String requiredName, String actualName) {
+        return requiredName == null || requiredName.isEmpty() || requiredName.equals(actualName);
+    }
+
     private Comparator<CloudFoundryServiceInstance> byLabels(List<String> serviceLabels) {
         return (l, r) -> getIndex(serviceLabels, l.getLabel()) - getIndex(serviceLabels, r.getLabel());
     }

cf-java-logging-support-opentelemetry-agent-extension/src/main/java/com/sap/hcf/cf/logging/opentelemetry/agent/ext/binding/VcapServiceProvider.java

@@ -0,0 +1,33 @@
+package com.sap.hcf.cf.logging.opentelemetry.agent.ext.binding;
+
+import com.sap.hcf.cf.logging.opentelemetry.agent.ext.config.ExtensionConfigurations.RUNTIME;
+import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.function.Supplier;
+
+public class VcapServiceProvider implements Supplier<CloudFoundryServiceInstance> {
+
+    private final CloudFoundryServiceInstance service;
+
+    public VcapServiceProvider(ConfigProperties config) {
+        this(config, CloudFoundryServicesAdapter.builder().build());
+    }
+
+    VcapServiceProvider(ConfigProperties config, CloudFoundryServicesAdapter adapter) {
+        String label = RUNTIME.CLOUD_FOUNDRY.SERVICE.VCAP_SERVICE.LABEL.getValue(config);
+        String tag = RUNTIME.CLOUD_FOUNDRY.SERVICE.VCAP_SERVICE.TAG.getValue(config);
+        String name = RUNTIME.CLOUD_FOUNDRY.SERVICE.VCAP_SERVICE.NAME.getValue(config);
+
+        List<String> serviceLabels = label != null ? List.of(label) : Collections.emptyList();
+        List<String> serviceTags = tag != null ? List.of(tag) : Collections.emptyList();
+
+        this.service = adapter.stream(serviceLabels, serviceTags, name).findFirst().orElse(null);
+    }
+
+    @Override
+    public CloudFoundryServiceInstance get() {
+        return service;
+    }
+}