use custom invoice plugin

Author: reshmabidikar

pom.xml

@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.kill-bill.billing</groupId>
         <artifactId>killbill-oss-parent</artifactId>
-        <version>0.146.6</version>
+        <version>0.146.30</version>
     </parent>
     <groupId>org.kill-bill.billing.plugin.java</groupId>
     <artifactId>hello-world-plugin</artifactId>
@@ -104,7 +104,6 @@
         <dependency>
             <groupId>org.kill-bill.billing.plugin</groupId>
             <artifactId>killbill-plugin-api-invoice</artifactId>
-            <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>org.kill-bill.billing.plugin</groupId>
@@ -140,6 +139,7 @@
             <artifactId>slf4j-api</artifactId>
             <scope>provided</scope>
         </dependency>
+
         <dependency>
             <groupId>org.testng</groupId>
             <artifactId>testng</artifactId>

src/main/java/org/killbill/billing/plugin/helloworld/HelloWorldActivator.java

@@ -37,6 +37,8 @@
 import org.killbill.billing.plugin.core.resources.jooby.PluginApp;
 import org.killbill.billing.plugin.core.resources.jooby.PluginAppBuilder;
 import org.osgi.framework.BundleContext;
+import org.osgi.util.tracker.ServiceTracker;
+import org.killbill.billing.invoice.plugin.api.InvoiceFormatterFactory;
 
 public class HelloWorldActivator extends KillbillActivatorBase {
 
@@ -50,6 +52,8 @@ public class HelloWorldActivator extends KillbillActivatorBase {
     private OSGIKillbillEventDispatcher.OSGIKillbillEventHandler killbillEventHandler;
     private MetricsGeneratorExample metricsGenerator;
 
+    private ServiceTracker<InvoiceFormatterFactory, InvoiceFormatterFactory> invoiceFormatterTracker;
+
     @Override
     public void start(final BundleContext context) throws Exception {
         super.start(context);
@@ -62,8 +66,13 @@ public void start(final BundleContext context) throws Exception {
                 .createConfigurable(configProperties.getProperties());
         helloWorldConfigurationHandler.setDefaultConfigurable(globalConfiguration);
 
+        // create a service tracker for a custom InvoiceFormatter service
+        invoiceFormatterTracker = new ServiceTracker<>(context, InvoiceFormatterFactory.class, null);
+        invoiceFormatterTracker.open();
+
+
         // Register an event listener (optional)
-        killbillEventHandler = new HelloWorldListener(killbillAPI);
+        killbillEventHandler = new HelloWorldListener(killbillAPI, invoiceFormatterTracker);
 
         // As an example, this plugin registers a PaymentPluginApi (this could be
         // changed to any other plugin api)

src/main/java/org/killbill/billing/plugin/helloworld/HelloWorldListener.java

@@ -19,13 +19,23 @@
 
 package org.killbill.billing.plugin.helloworld;
 
+import java.util.List;
+import java.util.Locale;
+
+import org.joda.time.LocalDate;
 import org.killbill.billing.account.api.Account;
 import org.killbill.billing.account.api.AccountApiException;
+import org.killbill.billing.invoice.api.Invoice;
+import org.killbill.billing.invoice.api.InvoiceItem;
+import org.killbill.billing.invoice.api.formatters.InvoiceFormatter;
+import org.killbill.billing.invoice.api.formatters.InvoiceItemFormatter;
+import org.killbill.billing.invoice.plugin.api.InvoiceFormatterFactory;
 import org.killbill.billing.notification.plugin.api.ExtBusEvent;
 import org.killbill.billing.osgi.libs.killbill.OSGIKillbillAPI;
 import org.killbill.billing.osgi.libs.killbill.OSGIKillbillEventDispatcher;
 import org.killbill.billing.plugin.api.PluginTenantContext;
 import org.killbill.billing.util.callcontext.TenantContext;
+import org.osgi.util.tracker.ServiceTracker;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -35,10 +45,15 @@ public class HelloWorldListener implements OSGIKillbillEventDispatcher.OSGIKillb
 
     private final OSGIKillbillAPI osgiKillbillAPI;
 
-    public HelloWorldListener(final OSGIKillbillAPI killbillAPI) {
+    private final ServiceTracker<InvoiceFormatterFactory, InvoiceFormatterFactory> invoiceFormatterTracker;
+
+    public HelloWorldListener(final OSGIKillbillAPI killbillAPI, final ServiceTracker<InvoiceFormatterFactory, InvoiceFormatterFactory> invoiceFormatterTracker) {
         this.osgiKillbillAPI = killbillAPI;
+        this.invoiceFormatterTracker = invoiceFormatterTracker;
     }
 
+    private static final String defaultLocale = "en_US";
+
     @Override
     public void handleKillbillEvent(final ExtBusEvent killbillEvent) {
         logger.info("Received event {} for object id {} of type {}",
@@ -60,7 +75,29 @@ public void handleKillbillEvent(final ExtBusEvent killbillEvent) {
                     logger.warn("Unable to find account", e);
                 }
                 break;
+            case INVOICE_CREATION:
+
+                final Account account;
+                try {
+                    account = osgiKillbillAPI.getAccountUserApi().getAccountById(killbillEvent.getAccountId(), context);
+                } catch (AccountApiException e) {
+                    throw new RuntimeException(e);
+                }
+                final List<Invoice> invoices = osgiKillbillAPI.getInvoiceUserApi().getInvoicesByAccount(killbillEvent.getAccountId(), false, false, true, context);
+                logger.info("Invoices in hello-world-plugin {}: ",invoices.size());
+                final InvoiceFormatterFactory formatterFactory = (invoiceFormatterTracker != null ? invoiceFormatterTracker.getService() : null);
+                Invoice invoice = invoices.get(0); //For demo purpose, we are only retrieving the formattedEndDate for the first invoice
+                //TODO Using null for parameters like catalogBundlePath,bundle, defaultBundle, etc. Update this to use correct values if possible or verify that using null values has no adverse effect
 
+                InvoiceFormatter invoiceFormatter = formatterFactory.createInvoiceFormatter(defaultLocale, null, invoice, Locale.forLanguageTag(account.getLocale()), osgiKillbillAPI.getCurrencyConversionApi(), null, null);
+
+                List<InvoiceItem> items = invoiceFormatter.getInvoiceItems();
+                logger.info("hello-world-plugin got items:{}",items.size());
+                for(InvoiceItem item:items) {
+                    final InvoiceItemFormatter invoiceItemFormatter = (InvoiceItemFormatter)item;
+                    final String formattedEndDate = invoiceItemFormatter.getFormattedEndDate();
+                    logger.info("hello-world-plugin formattedEndDate:{}",formattedEndDate);
+                }
             // Nothing
             default:
                 break;