Fix unknown Sender ID

.github/workflows/ci.yml

@@ -36,8 +36,9 @@ jobs:
           path: ~/.gradle/wrapper
           key: ${{ runner.os }}-gradle-wrapper-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}
       - name: Setup java
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v4
         with:
           java-version: ${{ matrix.java }}
+          distribution: 'temurin'
       - name: Build with gradle
         run: ./gradlew build

sdmx-json10/src/main/java/com/epam/jsdmx/json10/structure/writer/DefaultHeaderProvider.java

@@ -6,6 +6,7 @@
 import java.util.Locale;
 
 import com.epam.jsdmx.infomodel.sdmx30.DefaultLocaleHolder;
+import com.epam.jsdmx.infomodel.sdmx30.DefaultSenderIdHolder;
 import com.epam.jsdmx.infomodel.sdmx30.Party;
 import com.epam.jsdmx.serializer.sdmx30.common.Header;
 
@@ -24,17 +25,17 @@ public Header provide() {
         header.setContentLanguages(getDefaultLocales());
         header.setTest(false);
         header.setPrepared(Instant.now());
-        header.setSender(generateUnknownParty());
+        header.setSender(generateSender());
         return header;
     }
 
     private String generateId() {
         return "IDREF" + RandomUtils.nextInt(1000, 9999);
     }
 
-    private Party generateUnknownParty() {
+    private Party generateSender() {
         return Party.builder()
-            .id("unknown")
+            .id(DefaultSenderIdHolder.INSTANCE.get())
             .build();
     }
 

sdmx30-infomodel/src/main/java/com/epam/jsdmx/infomodel/sdmx30/DefaultSenderIdHolder.java

@@ -0,0 +1,31 @@
+package com.epam.jsdmx.infomodel.sdmx30;
+
+import org.apache.commons.lang3.StringUtils;
+
+/**
+ * Utility singleton class to hold the default Sender id for the library to be consumed
+ * by message header writers. The id is read from the environment variable
+ * <b>SDMX_SENDER_ID</b> and if not present, defaults to {@code "unknown"}.
+ */
+public class DefaultSenderIdHolder {
+
+    public static final DefaultSenderIdHolder INSTANCE = new DefaultSenderIdHolder();
+
+    public static final String SENDER_ID_VARIABLE_NAME = "SDMX_SENDER_ID";
+
+    private static final String DEFAULT_SENDER_ID = "unknown";
+
+    private final String senderId;
+
+    private DefaultSenderIdHolder() {
+        final String envSenderId = System.getenv(SENDER_ID_VARIABLE_NAME);
+        senderId = StringUtils.isEmpty(envSenderId) ? DEFAULT_SENDER_ID : envSenderId;
+    }
+
+    /**
+     * Returns current value of the default Sender id.
+     */
+    public String get() {
+        return senderId;
+    }
+}

sdmx30-serializer/src/main/java/com/epam/jsdmx/serializer/sdmx30/common/DefaultHeaderProvider.java

@@ -6,6 +6,7 @@
 import java.util.Locale;
 
 import com.epam.jsdmx.infomodel.sdmx30.DefaultLocaleHolder;
+import com.epam.jsdmx.infomodel.sdmx30.DefaultSenderIdHolder;
 import com.epam.jsdmx.infomodel.sdmx30.Party;
 
 import lombok.SneakyThrows;
@@ -33,17 +34,17 @@ public Header provide() {
         header.setContentLanguages(getDefaultLocales());
         header.setTest(false);
         header.setPrepared(Instant.now());
-        header.setSender(generateUnknownParty());
+        header.setSender(generateSenderParty());
         return header;
     }
 
     private String generateId() {
         return "IDREF" + RandomUtils.nextInt(1000, 9999);
     }
 
-    private Party generateUnknownParty() {
+    private Party generateSenderParty() {
         return Party.builder()
-            .id("unknown")
+            .id(DefaultSenderIdHolder.INSTANCE.get())
             .build();
     }