Java'da Basit Zaman Aşımı İstisnası nasıl oluşturulur?

Yayınlanan: 2018-02-26

Java - Basit Zaman Aşımı İstisnası nasıl oluşturulur

Java'da basit TimeoutException nasıl oluşturulur?

Bu eğitimde, 10 milisaniyelik basit bir gecikmeyle Google.com çağırırken Zaman Aşımı hatası üreteceğiz. CrunchifyGenerateTimeout, google.com'u connection.connect() kullanarak çağırdığımız genel bir çağrıdır.

CrunchifyGenerateTimeout.java
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package crunchify . com . tutorial ;
 
import java . io . BufferedReader ;
import java . io . IOException ;
import java . io . InputStreamReader ;
import java . net . HttpURLConnection ;
import java . net . URL ;
 
/**
* @author Crunchify.com
* Program: How to Generate Simple TimeoutException for a specific IP in Java
* Version: 1.0.1
*
*/
 
public class CrunchifyGenerateTimeout {
 
public static void main ( String [ ] args ) throws Exception {
new CrunchifyGenerateTimeout ( ) ;
}
 
public CrunchifyGenerateTimeout ( ) {
try {
String myUrl = "https://google.com/" ;
 
// myUrl = URLEncoder.encode(myUrl, "UTF-8");
 
String results = crunchifyCallURL ( myUrl ) ;
 
System . out . println ( results ) ;
} catch ( Exception e ) {
 
e . printStackTrace ( ) ;
}
}
 
/**
* Just return a result of URL call.
*
* @param crunchifyURL
* @return
* @throws Exception
*/
private String crunchifyCallURL ( String crunchifyURL ) throws Exception {
URL crunchURL = null ;
BufferedReader crunchReader = null ;
StringBuilder crunchBuilder ;
 
try {
// create the HttpURLConnection
crunchURL = new URL ( crunchifyURL ) ;
HttpURLConnection connection = ( HttpURLConnection ) crunchURL . openConnection ( ) ;
 
// Let's make GET call
connection . setRequestMethod ( "GET" ) ;
 
// Current Timeout 10 milliseconds - to generate Timeout Error
connection . setReadTimeout ( 10 ) ;
connection . connect ( ) ;
 
// Simply read result and print line
crunchReader = new BufferedReader ( new InputStreamReader ( connection . getInputStream ( ) ) ) ;
crunchBuilder = new StringBuilder ( ) ;
 
String eachLine = null ;
while ( ( eachLine = crunchReader . readLine ( ) ) ! = null ) {
crunchBuilder . append ( eachLine + "\n" ) ;
}
return crunchBuilder . toString ( ) ;
 
} catch ( Exception et ) {
et . printStackTrace ( ) ;
throw et ;
} finally {
if ( crunchReader ! = null ) {
try {
crunchReader . close ( ) ;
} catch ( IOException ioException ) {
ioException . printStackTrace ( ) ;
}
}
}
}
}

Sadece yukarıdaki programı Java uygulaması olarak çalıştırın ve Eclipse konsolunda TimeoutException oluşturabileceksiniz.

ReadTimeout'u 1000 milisaniyeye çıkarırsanız, istisnayı yeniden oluşturamazsınız.

// connection .setReadTimeout(1000);

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java.net.SocketTimeoutException: Read timed out
at java.base/java.net.SocketInputStream.socketRead0(Native Method)
at java.base/java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.base/java.net.SocketInputStream.read(SocketInputStream.java:171)
at java.base/java.net.SocketInputStream.read(SocketInputStream.java:141)
at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:425)
at java.base/sun.security.ssl.SSLSocketInputRecord.decode(SSLSocketInputRecord.java:154)
at java.base/sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1031)
at java.base/sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:973)
at java.base/sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1402)
at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1429)
at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
at java.base/sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:567)
at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:163)
at crunchify.com.tutorial.CrunchifyGenerateTimeout.doHttpUrlConnectionAction(CrunchifyGenerateTimeout.java:60)
at crunchify.com.tutorial.CrunchifyGenerateTimeout.<init>(CrunchifyGenerateTimeout.java:29)
at crunchify.com.tutorial.CrunchifyGenerateTimeout.main(CrunchifyGenerateTimeout.java:20)
java.net.SocketTimeoutException: Read timed out
at java.base/java.net.SocketInputStream.socketRead0(Native Method)
at java.base/java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.base/java.net.SocketInputStream.read(SocketInputStream.java:171)
at java.base/java.net.SocketInputStream.read(SocketInputStream.java:141)
at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:425)
at java.base/sun.security.ssl.SSLSocketInputRecord.decode(SSLSocketInputRecord.java:154)
at java.base/sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1031)
at java.base/sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:973)
at java.base/sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1402)
at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1429)
at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
at java.base/sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:567)
at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:163)
at crunchify.com.tutorial.CrunchifyGenerateTimeout.doHttpUrlConnectionAction(CrunchifyGenerateTimeout.java:60)
at crunchify.com.tutorial.CrunchifyGenerateTimeout.<init>(CrunchifyGenerateTimeout.java:29)
at crunchify.com.tutorial.CrunchifyGenerateTimeout.main(CrunchifyGenerateTimeout.java:20)