Usage

Maven Repository

<repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>

<dependency>
    <groupId>com.github.madvirus</groupId>
    <artifactId>stack-simplifier</artifactId>
    <version>0.0.3</version>
</dependency>

StackSimplier

StackSimplier simp = new StackSimplier();
simp.setExcludeClassPatterns( 
        "org.junit", "org.tomcat", "org.eclipse", "org.springframework", 
        "org.apache.tomcat", "oracle.jdbc", "SpringCGLIB");
simp.setIncludeClassPatterns("org.springframework.jdbc");
String msg = simplifier.simplify(ex);

The trace message that StackSimplier#simplify method creates

• contains stack trace of which class name doesn't matches exclusion class patterns
• but includes first stack trace whether it matches or not
• and includes stack trace which matches inclusion class patterns(and exclusion class patterns).

default exclusion class patterns

StackSimplier use following exclusion class pattern by default.

• ^sun
• ^java
• ^com.sun

setUseDefaultExcludeClassPattern

• specify whether to use default exclusion class patterns

setExcludeClassPatterns

• specify additional exclusion class name pattern

setIncludeClassPatterns

• specify inclusion class name pattern

class name pattern conversion rule

rule:

• replace dot notation by \.

ex:

• ^org.springframework -> ^org\.springframework

sample

@Test
public void simplify() throws Exception {
    StackSimplier simplier = new StackSimplier();
    simplier.setExcludeClassPatterns(new String[] {"org.junit", "com.intellij"});
    try {
        URL url = new URL("http://bad.server.xx");
        HttpURLConnection con = (HttpURLConnection) url.openConnection();
        con.getResponseCode();
    } catch(Exception ex) {
        ex.printStackTrace(System.out); // (1)
        System.out.println(simplier.simplify(ex)); // (2)
    }
}

raw exception trace(1):

java.net.UnknownHostException: bad.server.xx
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at java.net.Socket.connect(Socket.java:538)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1202)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1138)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1032)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:966)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1546)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)
	at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
	at stacksimp.StackSimplierTest.simplify(StackSimplierTest.java:17)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	...(skip, very very long message)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

simplified exception trace(2):

java.net.UnknownHostException: bad.server.xx
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
	at stacksimp.StackSimplierTest.simplify(StackSimplierTest.java:17)

StackSimplierBuilder

StackSimplier simp = StackSimplierBuilder.builder()
        .noUseDefault() // no use default exclusion pattern
        .excludeSpring() // exclude: ^org.springframework, SpringCGLIB
        .excludeMybatis() // exclude: ^org.mybatis, ^org.apache.ibatis
        .excludeHibernate() // exclude: ^org.hibernate
        .excludeTomcat() // exclude: ^org.apache.tomcat, ^org.apache.catalina, ^org.apache.coyote 
        .excludeJdbcDriver() // exclude: ^oracle.jdbc.driver, ^com.mysql.jdbc, ^com.microsoft.sqlserver.jdbc
        .excludeJunit() // exclude: ^org.junit
        .includeSunProxy() // include: ^com.sun.proxy
        .build();