Nice programming link

Nice programming link

Eclipse shortcut ‘public static void main(String args[])’

type main + ctrl + space 

Sanitizing a byte steam in Java

private InputStream sanitizeStream(InputStream in) throws IOException{

	BufferedInputStream bis = new BufferedInputStream(in);
	OutputStream output = new ByteArrayOutputStream();

	//Sanitize input stream
	int ch;
	while ((ch = bis.read()) != -1) {

		if ((ch == 0x9) || (ch == 0xA) || (ch == 0xD)
		    || ((ch >= 0x20) && (ch = 0xE000) && (ch = 0x10000) && (ch <= 0x10FFFF))) {

			output.write((int) ch);
		}

	}

	InputStream decodedInput = new ByteArrayInputStream(
			((ByteArrayOutputStream) output).toByteArray());

	return decodedInput;
}

Write CQL output to a file

1. Create a file (say cquery.txt) with any cassandra queries.. For ex. given below

use system;

select * from schema_keyspaces;

2. Run either of the following commands to achieve desired output

<cassandra_home>/bin/cqlsh -f cquery.txt > cquery.out

<cassandra_home>/bin/cqlsh --file=cquery.txt > cquery.out

How to list all the key spaces in Cassandra?

use system;

select * from schema_keyspaces;

How to list all the tables in a key space in Cassandra?

Its as simple as these 2 steps

1. use <keyspace_name>;

2. describe tables;

Installing OJDBC jar to local maven repository

1. Command to install ojdbc jar to local maven repository

mvn install:install-file -Dfile={path/to/your/ojdbc.jar} -DgroupId=com.oracle -DartifactId=ojdbc14 -Dversion=10.2.0.3.0 -Dpackaging=jar

2. Maven dependency to be added to the pom.xml

<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc14</artifactId>
<version>10.2.0.3.0</version>
</dependency>

Maven Integration for Eclipse JDK Warning

Things to be done to fix the problem

1. Add the following vm argument in the eclipse.ini

Note: This argument should be added before any of the vmargs
-vm C:/path/to/jdk/bin/javaw.exe

2. Change the Installed JREs to point to a JDK instance on your eclipse

Goto Window -> Preferences -> Java -> Installed JREs
Select the intalled JRE and click edit to point to a JDK home directory

JCP – Java Community Web Site

JCP – Java Community Web Site

JCP stands for Java Community Process. This website is a one shop stop to all JSR (Java Specification Requests). Each and every new Java API is born here!

Eclipse / Maven – Missing artifact jdk.tools:jdk.tools:jar:1.6

To resolve this error on your Eclipse all you have to do is

1. Copy the tools.jar from the jdk distribution on your machine to your local maven repository

mvn install:install-file -DgroupId=jdk.tools -DartifactId=jdk.tools -Dpackaging=jar -Dversion=1.6 -Dfile=tools.jar -DgeneratePom=true

2.  Add the following dependency in your pom.xml

<dependency>
    <groupId>jdk.tools</groupId>
    <artifactId>jdk.tools</artifactId>
    <version>1.6</version>
</dependency>