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refactoring: execute around idiom (#1945)

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* Refactor execute around the idiom

* fix checkstyle errors

Co-authored-by: Subhrodip Mohanta <hello@subho.xyz>
This commit is contained in:
Ilkka Seppälä
2022-01-10 13:34:19 +02:00
committed by GitHub
parent c5492184b7
commit 07ee94d671
3 changed files with 54 additions and 24 deletions
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execute-around/src/main/java/com/iluwatar/execute/around/App.java
+14 -4
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@@ -23,10 +23,14 @@
package com.iluwatar.execute.around;
import java.io.File;
import java.io.IOException;
import java.util.Scanner;
import lombok.extern.slf4j.Slf4j;
/**
* The Execute Around idiom specifies some code to be executed before and after a method. Typically
* The Execute Around idiom specifies executable code before and after a method. Typically
* the idiom is used when the API has methods to be executed in pairs, such as resource
* allocation/deallocation or lock acquisition/release.
*
@@ -34,6 +38,7 @@ import java.io.IOException;
* the user. The user specifies only what to do with the file by providing the {@link
* FileWriterAction} implementation.
*/
@Slf4j
public class App {
/**
@@ -41,11 +46,16 @@ public class App {
*/
public static void main(String[] args) throws IOException {
// create the file writer and execute the custom action
FileWriterAction writeHello = writer -> {
writer.write("Hello");
writer.append(" ");
writer.append("there!");
writer.write("Gandalf was here");
};
new SimpleFileWriter("testfile.txt", writeHello);
// print the file contents
var scanner = new Scanner(new File("testfile.txt"));
while (scanner.hasNextLine()) {
LOGGER.info(scanner.nextLine());
}
}
}