Fix compilation errors

Revert Confluent version bump
Revert Avro version bump (cannot use 0.12.0 as it requires Java 11, but this branch is using Java 8)

Author: mjsax

pom.xml

@@ -7,7 +7,7 @@
     <parent>
         <groupId>io.confluent</groupId>
         <artifactId>rest-utils-parent</artifactId>
-        <version>[7.3.0-0,7.4.0-0)</version>
+        <version>[7.2.15-0, 7.2.16-0)</version>
     </parent>
 
     <artifactId>kafka-streams-examples</artifactId>
@@ -50,7 +50,7 @@
     -->
     <properties>
         <algebird.version>0.13.7</algebird.version>
-        <avro.version>1.12.0</avro.version>
+        <avro.version>1.11.4</avro.version>
         <chill.version>0.9.5</chill.version>
         <docker.skip-build>false</docker.skip-build>
         <docker.skip-test>false</docker.skip-test>

src/main/java/io/confluent/examples/streams/microservices/AddInventory.java

@@ -79,7 +79,7 @@ public static void main(final String[] args) throws Exception {
 
         final String bootstrapServers = cl.getOptionValue("b", DEFAULT_BOOTSTRAP_SERVERS);
 
-        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", null))
+        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", (String) null))
                 .map(path -> {
                     try {
                         return buildPropertiesFromConfigFile(path);

src/main/java/io/confluent/examples/streams/microservices/EmailService.java

@@ -152,7 +152,7 @@ public static void main(final String[] args) throws Exception {
     }
     final EmailService service = new EmailService(new LoggingEmailer());
 
-    final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", null))
+    final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", (String) null))
             .map(path -> {
               try {
                 return buildPropertiesFromConfigFile(path);

src/main/java/io/confluent/examples/streams/microservices/FraudService.java

@@ -166,7 +166,7 @@ public static void main(final String[] args) throws Exception {
       return;
     }
     final FraudService service = new FraudService();
-    final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", null))
+    final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", (String) null))
             .map(path -> {
               try {
                 return buildPropertiesFromConfigFile(path);

src/main/java/io/confluent/examples/streams/microservices/InventoryService.java

@@ -202,7 +202,7 @@ public static void main(final String[] args) throws Exception {
       return;
     }
 
-    final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", null))
+    final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", (String) null))
             .map(path -> {
               try {
                 return buildPropertiesFromConfigFile(path);

src/main/java/io/confluent/examples/streams/microservices/OrderDetailsService.java

@@ -220,7 +220,7 @@ public static void main(final String[] args) throws Exception {
       formatter.printHelp("Order Details Service", opts);
       return;
     }
-    final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", null))
+    final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", (String) null))
             .map(path -> {
               try {
                 return buildPropertiesFromConfigFile(path);

src/main/java/io/confluent/examples/streams/microservices/OrdersService.java

@@ -445,7 +445,7 @@ public static void main(final String[] args) throws Exception {
     final int restPort = Integer.parseInt(cl.getOptionValue("port", "5432"));
     final String stateDir = cl.getOptionValue("state-dir", "/tmp/kafka-streams");
 
-    final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", null))
+    final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", (String) null))
             .map(path -> {
               try {
                 return buildPropertiesFromConfigFile(path);

src/main/java/io/confluent/examples/streams/microservices/PostOrdersAndPayments.java

@@ -96,7 +96,7 @@ public static void main(final String[] args) throws Exception {
         final String orderServiceUrl = cl.getOptionValue("order-service-url", "http://localhost:5432");
         final int startingOrderId = Integer.parseInt(cl.getOptionValue("order-id", "1"));
 
-        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", null))
+        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", (String) null))
                 .map(path -> {
                     try {
                         return buildPropertiesFromConfigFile(path);

src/main/java/io/confluent/examples/streams/microservices/ValidationsAggregatorService.java

@@ -180,7 +180,7 @@ public static void main(final String[] args) throws Exception {
       formatter.printHelp("Validator Aggregator Service", opts);
       return;
     }
-    final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", null))
+    final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", (String) null))
             .map(path -> {
               try {
                 return buildPropertiesFromConfigFile(path);

src/main/java/io/confluent/examples/streams/microservices/util/ConsumeCustomers.java

@@ -40,7 +40,7 @@ public static void main(final String[] args) throws Exception {
         final String bootstrapServers = cl.getOptionValue("b", DEFAULT_BOOTSTRAP_SERVERS);
         final String schemaRegistryUrl = cl.getOptionValue("schema-registry", DEFAULT_SCHEMA_REGISTRY_URL);
 
-        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", null))
+        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", (String) null))
                 .map(path -> {
                     try {
                         return buildPropertiesFromConfigFile(path);

src/main/java/io/confluent/examples/streams/microservices/util/ConsumeOrders.java

@@ -40,7 +40,7 @@ public static void main(final String[] args) throws Exception {
         final String bootstrapServers = cl.getOptionValue("b", DEFAULT_BOOTSTRAP_SERVERS);
         final String schemaRegistryUrl = cl.getOptionValue("schema-registry", DEFAULT_SCHEMA_REGISTRY_URL);
 
-        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", null))
+        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", (String) null))
                 .map(path -> {
                     try {
                         return buildPropertiesFromConfigFile(path);

src/main/java/io/confluent/examples/streams/microservices/util/ConsumePayments.java

@@ -39,7 +39,7 @@ public static void main(final String[] args) throws Exception {
         final String bootstrapServers = cl.getOptionValue("b", DEFAULT_BOOTSTRAP_SERVERS);
         final String schemaRegistryUrl = cl.getOptionValue("schema-registry", DEFAULT_SCHEMA_REGISTRY_URL);
 
-        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", null))
+        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", (String) null))
                 .map(path -> {
                     try {
                         return buildPropertiesFromConfigFile(path);

src/main/java/io/confluent/examples/streams/microservices/util/ProduceCustomers.java

@@ -46,7 +46,7 @@ public static void main(final String[] args) throws Exception {
             Collections.singletonMap(AbstractKafkaSchemaSerDeConfig.SCHEMA_REGISTRY_URL_CONFIG, schemaRegistryUrl),
             isKeySerde);
 
-        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", null))
+        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", (String) null))
             .map(path -> {
                 try {
                     return buildPropertiesFromConfigFile(path);

src/main/java/io/confluent/examples/streams/microservices/util/ProduceOrders.java

@@ -40,7 +40,7 @@ public static void main(final String[] args) throws Exception {
 
         final CommandLine cl = new DefaultParser().parse(opts, args);
 
-        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", null))
+        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", (String) null))
                 .map(path -> {
                     try {
                         return buildPropertiesFromConfigFile(path);

src/main/java/io/confluent/examples/streams/microservices/util/ProducePayments.java

@@ -38,7 +38,7 @@ public static void main(final String[] args) throws Exception {
 
         final CommandLine cl = new DefaultParser().parse(opts, args);
 
-        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", null))
+        final Properties defaultConfig = Optional.ofNullable(cl.getOptionValue("config-file", (String) null))
                 .map(path -> {
                     try {
                         return buildPropertiesFromConfigFile(path);