feat: support rabbitmq headers

ballerina/Ballerina.toml

@@ -1,7 +1,7 @@
 [package]
 org = "ballerinax"
 name = "rabbitmq"
-version = "3.1.0"
+version = "3.1.1"
 authors = ["Ballerina"]
 keywords = ["service", "client", "messaging", "network", "pubsub"]
 repository = "https://github.com/ballerina-platform/module-ballerinax-rabbitmq"
@@ -18,8 +18,8 @@ path = "./lib/amqp-client-5.18.0.jar"
 [[platform.java17.dependency]]
 groupId = "io.ballerina.stdlib"
 artifactId = "rabbitmq-native"
-version = "3.1.0"
-path = "../native/build/libs/rabbitmq-native-3.1.0.jar"
+version = "3.1.1"
+path = "../native/build/libs/rabbitmq-native-3.1.1-SNAPSHOT.jar"
 
 [[platform.java17.dependency]]
 groupId = "io.ballerina.stdlib"

ballerina/CompilerPlugin.toml

@@ -3,4 +3,4 @@ id = "rabbitmq-compiler-plugin"
 class = "io.ballerina.stdlib.rabbitmq.plugin.RabbitmqCompilerPlugin"
 
 [[dependency]]
-path = "../compiler-plugin/build/libs/rabbitmq-compiler-plugin-3.1.0.jar"
+path = "../compiler-plugin/build/libs/rabbitmq-compiler-plugin-3.1.1-SNAPSHOT.jar"

ballerina/Dependencies.toml

@@ -389,7 +389,7 @@ modules = [
 [[package]]
 org = "ballerinax"
 name = "rabbitmq"
-version = "3.1.0"
+version = "3.1.1"
 dependencies = [
 	{org = "ballerina", name = "constraint"},
 	{org = "ballerina", name = "crypto"},

ballerina/rabbitmq_commons.bal

@@ -43,11 +43,13 @@ public const TOPIC_EXCHANGE = "topic";
 # + contentType - The content type of the message
 # + contentEncoding - The content encoding of the message
 # + correlationId - The client-specific ID that can be used to mark or identify messages between clients
+# + headers - A map of additional arbitrary headers to be included in the message
 public type BasicProperties record {|
     string replyTo?;
     string contentType?;
     string contentEncoding?;
     string correlationId?;
+    map<anydata> headers?;
 |};
 
 # Additional configurations used to declare a queue.

ballerina/tests/rabbitmq_client_tests.bal

@@ -379,6 +379,43 @@ public isolated function testProducerTransactional() returns error? {
     return;
 }
 
+@test:Config {
+    dependsOn: [testClient],
+    groups: ["rabbitmq"]
+}
+public isolated function testProducerWithHeaders() returns error? {
+    string queue = "testProducerWithHeaders";
+    string message = "Test producing with headers";
+    Client newClient = check new (DEFAULT_HOST, DEFAULT_PORT);
+    map<string> headers = {
+        "header1": "value1",
+        "header2": "value2"
+    };
+    check newClient->queueDeclare(queue);
+    check newClient->publishMessage({content: message.toBytes(), routingKey: queue, properties: {headers: headers}});
+    BytesMessage|Error consumeResult = newClient->consumeMessage(queue, false);
+    if consumeResult is BytesMessage {
+        string messageContent = check 'string:fromBytes(consumeResult.content);
+        BasicProperties? properties = consumeResult.properties;
+
+        if properties is BasicProperties {
+            map<anydata>? receivedHeaders = properties.headers;
+            if receivedHeaders is () {
+                test:assertFail("No headers received.");
+            } else {
+                test:assertEquals(receivedHeaders["header1"], "value1", msg = "Header1 mismatch.");
+                test:assertEquals(receivedHeaders["header2"], "value2", msg = "Header2 mismatch.");
+            }
+        }
+        log:printInfo("The message received: " + messageContent);
+        test:assertEquals(messageContent, message, msg = "Message received does not match.");
+    } else {
+        test:assertFail("Error when trying to consume messages using client.");
+    }
+    check newClient->close();
+    return;
+}
+
 @test:Config {
     dependsOn: [testClient],
     groups: ["rabbitmq"]
@@ -418,7 +455,7 @@ public isolated function testDeclareQueueWithArgsNegative() returns error? {
         string expectedError = "Error occurred while declaring the queue: Unsupported type in arguments map passed "
                         + "while declaring a queue.";
         test:assertEquals(result.message(), expectedError,
-                    msg = "Error message mismatch in declaring queue with invalid args.");
+                msg = "Error message mismatch in declaring queue with invalid args.");
     }
     return newClient->close();
 }
@@ -594,11 +631,11 @@ public function testListenerQueueDeclareDuplicate() returns error? {
 }
 
 @test:Config {
-    dependsOn: [testListener, testSyncConsumer,testListenerQueueDeclareDuplicate],
+    dependsOn: [testListener, testSyncConsumer, testListenerQueueDeclareDuplicate],
     groups: ["rabbitmq"]
 }
 public function testListenerQueueDeclareDuplicateError() returns error? {
-    Listener channelListener = check new(DEFAULT_HOST, DEFAULT_PORT);
+    Listener channelListener = check new (DEFAULT_HOST, DEFAULT_PORT);
     if channelListener is Listener {
         error? result = channelListener.attach(queueConfigDuplicateError);
         test:assertTrue(result is error, msg = "Error expected when declaring same queue with different properties.");

compiler-plugin/src/main/java/io/ballerina/stdlib/rabbitmq/plugin/PluginConstants.java

@@ -44,6 +44,7 @@ public class PluginConstants {
     public static final String MESSAGE_CONTENT_TYPE = "contentType";
     public static final String MESSAGE_CONTENT_ENCODING = "contentEncoding";
     public static final String MESSAGE_CORRELATION_ID = "correlationId";
+    public static final String MESSAGE_HEADERS = "headers";
 
     // return types error or nil
     public static final String ERROR = "error";

compiler-plugin/src/main/java/io/ballerina/stdlib/rabbitmq/plugin/RabbitmqFunctionValidator.java

@@ -107,6 +107,7 @@
 import static io.ballerina.stdlib.rabbitmq.plugin.PluginConstants.MESSAGE_CORRELATION_ID;
 import static io.ballerina.stdlib.rabbitmq.plugin.PluginConstants.MESSAGE_DELIVERY_TAG;
 import static io.ballerina.stdlib.rabbitmq.plugin.PluginConstants.MESSAGE_EXCHANGE;
+import static io.ballerina.stdlib.rabbitmq.plugin.PluginConstants.MESSAGE_HEADERS;
 import static io.ballerina.stdlib.rabbitmq.plugin.PluginConstants.MESSAGE_PROPERTIES;
 import static io.ballerina.stdlib.rabbitmq.plugin.PluginConstants.MESSAGE_REPLY_TO;
 import static io.ballerina.stdlib.rabbitmq.plugin.PluginConstants.MESSAGE_ROUTING_KEY;
@@ -403,10 +404,11 @@ private boolean validatePropertiesField(TypeSymbol propertiesTypeSymbol) {
             propertiesRecordSymbol = (RecordTypeSymbol) propertiesTypeSymbol;
         }
         Map<String, RecordFieldSymbol> propertiesFieldDescriptors = propertiesRecordSymbol.fieldDescriptors();
-        if (propertiesFieldDescriptors.size() != 4 || !propertiesFieldDescriptors.containsKey(MESSAGE_REPLY_TO) ||
+        if (propertiesFieldDescriptors.size() != 5 || !propertiesFieldDescriptors.containsKey(MESSAGE_REPLY_TO) ||
                 !propertiesFieldDescriptors.containsKey(MESSAGE_CONTENT_TYPE) ||
                 !propertiesFieldDescriptors.containsKey(MESSAGE_CONTENT_ENCODING) ||
-                !propertiesFieldDescriptors.containsKey(MESSAGE_CORRELATION_ID)) {
+                !propertiesFieldDescriptors.containsKey(MESSAGE_CORRELATION_ID) ||
+                !propertiesFieldDescriptors.containsKey(MESSAGE_HEADERS)) {
             return false;
         }
         if (propertiesFieldDescriptors.get(MESSAGE_REPLY_TO).typeDescriptor().typeKind() != STRING) {
@@ -421,6 +423,9 @@ private boolean validatePropertiesField(TypeSymbol propertiesTypeSymbol) {
         if (propertiesFieldDescriptors.get(MESSAGE_CORRELATION_ID).typeDescriptor().typeKind() != STRING) {
             return false;
         }
+        if (propertiesFieldDescriptors.get(MESSAGE_HEADERS).typeDescriptor().typeKind() != MAP) {
+            return false;
+        }
         return true;
     }
 

native/src/main/java/io/ballerina/stdlib/rabbitmq/RabbitMQConstants.java

@@ -144,6 +144,7 @@ public class RabbitMQConstants {
     public static final BString ALIAS_CONTENT_TYPE = StringUtils.fromString("contentType");
     public static final BString ALIAS_CONTENT_ENCODING = StringUtils.fromString("contentEncoding");
     public static final BString ALIAS_CORRELATION_ID = StringUtils.fromString("correlationId");
+    public static final BString ALIAS_HEADERS = StringUtils.fromString("headers");
 
     private RabbitMQConstants() {
     }

native/src/main/java/io/ballerina/stdlib/rabbitmq/RabbitMQUtils.java

@@ -43,6 +43,7 @@
 
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
+import java.util.Map;
 
 import static io.ballerina.runtime.api.TypeTags.INTERSECTION_TAG;
 import static io.ballerina.runtime.api.TypeTags.STRING_TAG;
@@ -138,14 +139,24 @@ public static BMap<BString, Object> createAndPopulateMessageRecord(byte[] messag
             String contentType = properties.getContentType();
             String contentEncoding = properties.getContentEncoding();
             String correlationId = properties.getCorrelationId();
+            Map<String, Object> headersMap = properties.getHeaders();
+            BMap<BString, Object> headers = ValueCreator.createMapValue();
+
+            if (headersMap != null) {
+                headersMap.forEach((key, value) -> headers.put(StringUtils.fromString(key), StringUtils.fromString(
+                        value.toString())));
+            }
+
             BMap<BString, Object> basicProperties =
                     ValueCreator.createRecordValue(getModule(),
                             RabbitMQConstants.RECORD_BASIC_PROPERTIES);
-            Object[] propValues = new Object[4];
+            Object[] propValues = new Object[5];
             propValues[0] = replyTo;
             propValues[1] = contentType;
             propValues[2] = contentEncoding;
             propValues[3] = correlationId;
+            propValues[4] = headers;
+
             messageRecord.put(StringUtils.fromString(MESSAGE_PROPERTIES_FIELD), ValueCreator
                     .createRecordValue(basicProperties, propValues));
         }

native/src/main/java/io/ballerina/stdlib/rabbitmq/util/ChannelUtils.java

@@ -282,6 +282,7 @@ public static Object publishNative(Environment environment, BObject channelObj,
                 String contentType = null;
                 String contentEncoding = null;
                 String correlationId = null;
+                Map<String, Object> headers = new HashMap<>();
                 if (basicPropsMap.containsKey(RabbitMQConstants.ALIAS_REPLY_TO)) {
                     replyTo = basicPropsMap.getStringValue(RabbitMQConstants.ALIAS_REPLY_TO).getValue();
                 }
@@ -295,6 +296,14 @@ public static Object publishNative(Environment environment, BObject channelObj,
                 if (basicPropsMap.containsKey(RabbitMQConstants.ALIAS_CORRELATION_ID)) {
                     correlationId = basicPropsMap.getStringValue(RabbitMQConstants.ALIAS_CORRELATION_ID).getValue();
                 }
+                if (basicPropsMap.containsKey(RabbitMQConstants.ALIAS_HEADERS)) {
+                    @SuppressWarnings(RabbitMQConstants.UNCHECKED)
+                    BMap<BString, BString> headersMap = (BMap<BString, BString>) basicPropsMap
+                            .getMapValue(RabbitMQConstants.ALIAS_HEADERS);
+                    headersMap.entrySet()
+                            .forEach(entry -> headers.put(entry.getKey().getValue(),
+                                    headersMap.getStringValue(entry.getKey()).getValue()));
+                }
                 if (replyTo != null) {
                     builder.replyTo(replyTo);
                 }
@@ -307,6 +316,9 @@ public static Object publishNative(Environment environment, BObject channelObj,
                 if (correlationId != null) {
                     builder.correlationId(correlationId);
                 }
+                if (!headers.isEmpty()) {
+                    builder.headers(headers);
+                }
             }
             if (TransactionResourceManager.getInstance().isInTransaction()) {
                 RabbitMQUtils.handleTransaction(channelObj);