Revision: dc8549564eec
Author: sberlin <sber...@gmail.com>
Date: Mon Feb 10 15:19:43 2014 UTC
Log: simplify example
http://code.google.com/p/google-guice/source/detail?r=dc8549564eec&repo=wiki
Modified:
/GettingStarted.wiki
=======================================
--- /GettingStarted.wiki Sat May 21 18:15:32 2011 UTC
+++ /GettingStarted.wiki Mon Feb 10 15:19:43 2014 UTC
@@ -4,14 +4,14 @@
Building object graphs by hand is labour intensive, error prone, and makes
testing difficult. Instead, Guice can build the object graph for you. But
first, Guice needs to be configured to build the graph exactly as you want
it.
-To illustrate, we'll start the `RealBillingService` class that accepts its
dependent interfaces `CreditCardProcessor` and `TransactionLog` in its
constructor. To make it explicit that the `RealBillingService` constructor
is invoked by Guice, we add the `@Inject` annotation:
+To illustrate, we'll start the `BillingService` class that accepts its
dependent interfaces `CreditCardProcessor` and `TransactionLog` in its
constructor. To make it explicit that the `BillingService` constructor is
invoked by Guice, we add the `@Inject` annotation:
{{{
-class RealBillingService implements BillingService {
+class BillingService {
private final CreditCardProcessor processor;
private final TransactionLog transactionLog;
@Inject
- RealBillingService(CreditCardProcessor processor,
+ BillingService(CreditCardProcessor processor,
TransactionLog transactionLog) {
this.processor = processor;
this.transactionLog = transactionLog;
@@ -23,7 +23,7 @@
}
}
}}}
-We want to build a `RealBillingService` using `PaypalCreditCardProcessor`
and `DatabaseTransactionLog`. Guice uses *bindings* to map types to their
implementations. A *module* is a collection of bindings specified using
fluent, English-like method calls:
+We want to build a `BillingService` using `PaypalCreditCardProcessor` and
`DatabaseTransactionLog`. Guice uses *bindings* to map types to their
implementations. A *module* is a collection of bindings specified using
fluent, English-like method calls:
{{{
public class BillingModule extends AbstractModule {
@Override
@@ -43,7 +43,7 @@
}
}
}}}
-The modules are the building blocks of an *injector*, which is Guice's
object-graph builder. First we create the injector, and then we can use
that to build the `RealBillingService`:
+The modules are the building blocks of an *injector*, which is Guice's
object-graph builder. First we create the injector, and then we can use
that to build the `BillingService`:
{{{
public static void main(String[] args) {
/*
@@ -56,7 +56,7 @@
/*
* Now that we've got the injector, we can build objects.
*/
- RealBillingService billingService =
injector.getInstance(RealBillingService.class);
+ BillingService billingService =
injector.getInstance(BillingService.class);
...
}
}}}
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