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java-tutorials
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Beverley Talbott 2013-08-12 15:40:56 -07:00
parent 23c51c6358 0928cea4d8
commit 3090229867
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65
README.src.md → README.ftl.md
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@ -1,43 +1,38 @@
# Getting Started: Creating a Batch Service
<#assign project_id="gs-batch-processing">
This guide walks you through creating a basic batch-driven solution.
What you'll build
-----------------
This guide walks you through creating a basic batch-driven solution. You build a service that imports data from a CSV spreadsheet, transforms it with custom code, and stores the final results in a database.
You build a service that imports data from a CSV spreadsheet, transforms it with custom code, and stores the final results in a database.
What you'll need
----------------
- About 15 minutes
- {!include#prereq-editor-jdk-buildtools}
- <@prereq_editor_jdk_buildtools/>
## <@how_to_complete_this_guide jump_ahead='Create a business class'/>
## {!include#how-to-complete-this-guide}
<a name="scratch"></a>
Set up the project
------------------
{!include#build-system-intro}
<@build_system_intro/>
{!include#create-directory-structure-hello}
<@create_directory_structure_hello/>
### Create a Maven POM
{!include:initial/pom.xml}
<@snippet path="pom.xml" prefix="initial"/>
{!include#bootstrap-starter-pom-disclaimer}
<@bootstrap_starter_pom_disclaimer/>
### Create business data
Typically your customer or a business analyst supplies a spreadsheet. In this case, you make it up.
`src/main/resources/sample-data.csv`
```text
Jill,Doe
Joe,Doe
Justin,Doe
Jane,Doe
John,Doe
```
<@snippet path="src/main/resources/sample-data.csv" prefix="initial"/>
This spreadsheet contains a first name and a last name on each row, separated by a comma. This is a fairly common pattern that Spring handles out-of-the-box, as you will see.
@ -45,7 +40,9 @@ This spreadsheet contains a first name and a last name on each row, separated by
Next, you write a SQL script to create a table to store the data.
{!include:complete/src/main/resources/schema.sql}
<@snippet path="src/main/resources/schema-all.sql" prefix="initial"/>
> **Note:** Spring Boot runs `schema-@@platform@@.sql` automatically during startup. `-all` is the default for all platforms.
<a name="initial"></a>
Create a business class
@ -53,7 +50,7 @@ Create a business class
Now that you see the format of data inputs and outputs, you write code to represent a row of data.
{!include:complete/src/main/java/hello/Person.java}
<@snippet path="src/main/java/hello/Person.java" prefix="complete"/>
You can instantiate the `Person` class either with first and last name through a constructor, or by setting the properties.
@ -62,7 +59,7 @@ Create an intermediate processor
A common paradigm in batch processing is to ingest data, transform it, and then pipe it out somewhere else. Here you write a simple transformer that converts the names to uppercase.
{!include:complete/src/main/java/hello/PersonItemProcessor.java}
<@snippet path="src/main/java/hello/PersonItemProcessor.java" prefix="complete"/>
`PersonItemProcessor` implements Spring Batch's `ItemProcessor` interface. This makes it easy to wire the code into a batch job that you define further down in this guide. According to the interface, you receive an incoming `Person` object, after which you transform it to an upper-cased `Person`.
@ -73,13 +70,13 @@ Put together a batch job
Now you put together the actual batch job. Spring Batch provides many utility classes that reduce the need to write custom code. Instead, you can focus on the business logic.
{!include:complete/src/main/java/hello/BatchConfiguration.java}
<@snippet path="src/main/java/hello/BatchConfiguration.java" prefix="complete"/>
For starters, the `@EnableBatchProcessing` annotation adds many critical beans that support jobs and saves you a lot of leg work.
Break it down:
{!include:complete/src/main/java/hello/BatchConfiguration.java#reader-writer-processor}
<@snippet "src/main/java/hello/BatchConfiguration.java" "readerwriterprocessor" "/complete"/>
The first chunk of code defines the input, processor, and output.
- `reader()` creates an `ItemReader`. It looks for a file called `sample-data.csv` and parses each line item with enough information to turn it into a `Person`.
@ -88,7 +85,7 @@ The first chunk of code defines the input, processor, and output.
The next chunk focuses on the actual job configuration.
{!include:complete/src/main/java/hello/BatchConfiguration.java#job-step}
<@snippet "src/main/java/hello/BatchConfiguration.java" "jobstep" "/complete"/>
The first method defines the job and the second one defines a single step. Jobs are built from steps, where each step can involve a reader, a processor, and a writer.
@ -100,29 +97,13 @@ In the step definition, you define how much data to write at a time. In this cas
Finally, you run the application.
{!include:complete/src/main/java/hello/BatchConfiguration.java#template-main}
<@snippet "src/main/java/hello/BatchConfiguration.java" "templatemain" "/complete"/>
This example uses a memory-based database (provided by `@EnableBatchProcessing`), meaning that when it's done, the data is gone. For demonstration purposes, there is extra code to create a `JdbcTemplate`, query the database, and print out the names of people the batch job inserts.
## <@build_an_executable_jar/>
Build an executable JAR
-----------------------
Add the following to your `pom.xml` file, keeping existing properties and plugins intact:
{!include:complete/pom.xml#shade-config}
Create a single executable JAR file containing all necessary dependency classes:
$ mvn package
Run the batch job
-----------------
Now you can run the job from the JAR as well, and distribute that as an executable artifact:
$ java -jar target/gs-batch-processing-complete-0.1.0.jar
<@run_the_application_with_maven module="batch job"/>
The job prints out a line for each person that gets transformed. After the job runs, you can also see the output from querying the database.
@ -130,5 +111,3 @@ Summary
-------
Congratulations! You built a batch job that ingested data from a spreadsheet, processed it, and wrote it to a database.
[zip]: https://github.com/springframework-meta/gs-batch-processing/archive/master.zip

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@ -0,0 +1,31 @@
### Related Resources
There's more to data integration than is covered here. You may want to continue your exploration of Spring messaging and integration with the following
### Getting Started Guides
* [Integrating Data][gs-integration]
* [Capturing Stream Data][gs-capturing-stream-data]
* [Messaging with JMS][gs-messaging-jms]
* [Messaging with RabbitMQ][gs-messaging-rabbitmq]
* [Messaging with Redis][gs-messaging-redis]
[gs-integration]: /guides/gs/integration/
[gs-capturing-stream-data]: /guides/gs/capturing-stream-data/
[gs-messaging-jms]: /guides/gs/messaging-jms/
[gs-messaging-rabbitmq]: /guides/gs/messaging-rabbitmq/
[gs-messaging-redis]: /guides/gs/messaging-redis/
### Tutorials
* [Designing and Implementing RESTful Web Services with Spring][tut-rest]
[tut-rest]: /guides/tutorials/rest
### Understanding
* [REST][u-rest]
* [JSON][u-json]
[u-rest]: /understanding/REST
[u-json]: /understanding/JSON

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complete/build.gradle Normal file
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@ -0,0 +1,34 @@
buildscript {
repositories {
maven { url "http://repo.springsource.org/libs-snapshot" }
mavenLocal()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:0.5.0.BUILD-SNAPSHOT")
}
}
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'idea'
apply plugin: 'spring-boot'
jar {
baseName = 'gs-batch-processing'
version = '0.1.0'
}
repositories {
mavenCentral()
maven { url "http://repo.springsource.org/libs-snapshot" }
}
dependencies {
compile("org.springframework.boot:spring-boot-starter-batch:0.5.0.BUILD-SNAPSHOT")
compile("org.hsqldb:hsqldb")
testCompile("junit:junit:4.11")
}
task wrapper(type: Wrapper) {
gradleVersion = '1.7'
}

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complete/gradle/wrapper/gradle-wrapper.properties vendored Normal file
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@ -0,0 +1,6 @@
#Fri Aug 09 11:38:26 CDT 2013
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=http\://services.gradle.org/distributions/gradle-1.7-bin.zip

164
complete/gradlew vendored Executable file
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@ -0,0 +1,164 @@
#!/usr/bin/env bash
##############################################################################
##
## Gradle start up script for UN*X
##
##############################################################################
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS=""
APP_NAME="Gradle"
APP_BASE_NAME=`basename "$0"`
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD="maximum"
warn ( ) {
echo "$*"
}
die ( ) {
echo
echo "$*"
echo
exit 1
}
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
case "`uname`" in
CYGWIN* )
cygwin=true
;;
Darwin* )
darwin=true
;;
MINGW* )
msys=true
;;
esac
# For Cygwin, ensure paths are in UNIX format before anything is touched.
if $cygwin ; then
[ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
fi
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
PRG="$0"
# Need this for relative symlinks.
while [ -h "$PRG" ] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> \(.*\)$'`
if expr "$link" : '/.*' > /dev/null; then
PRG="$link"
else
PRG=`dirname "$PRG"`"/$link"
fi
done
SAVED="`pwd`"
cd "`dirname \"$PRG\"`/" >&-
APP_HOME="`pwd -P`"
cd "$SAVED" >&-
CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD="$JAVA_HOME/jre/sh/java"
else
JAVACMD="$JAVA_HOME/bin/java"
fi
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD="java"
which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
# Increase the maximum file descriptors if we can.
if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
MAX_FD_LIMIT=`ulimit -H -n`
if [ $? -eq 0 ] ; then
if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
MAX_FD="$MAX_FD_LIMIT"
fi
ulimit -n $MAX_FD
if [ $? -ne 0 ] ; then
warn "Could not set maximum file descriptor limit: $MAX_FD"
fi
else
warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
fi
fi
# For Darwin, add options to specify how the application appears in the dock
if $darwin; then
GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
fi
# For Cygwin, switch paths to Windows format before running java
if $cygwin ; then
APP_HOME=`cygpath --path --mixed "$APP_HOME"`
CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
# We build the pattern for arguments to be converted via cygpath
ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
SEP=""
for dir in $ROOTDIRSRAW ; do
ROOTDIRS="$ROOTDIRS$SEP$dir"
SEP="|"
done
OURCYGPATTERN="(^($ROOTDIRS))"
# Add a user-defined pattern to the cygpath arguments
if [ "$GRADLE_CYGPATTERN" != "" ] ; then
OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
fi
# Now convert the arguments - kludge to limit ourselves to /bin/sh
i=0
for arg in "$@" ; do
CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
else
eval `echo args$i`="\"$arg\""
fi
i=$((i+1))
done
case $i in
(0) set -- ;;
(1) set -- "$args0" ;;
(2) set -- "$args0" "$args1" ;;
(3) set -- "$args0" "$args1" "$args2" ;;
(4) set -- "$args0" "$args1" "$args2" "$args3" ;;
(5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
(6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
(7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
(8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
(9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
esac
fi
# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
function splitJvmOpts() {
JVM_OPTS=("$@")
}
eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"

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complete/gradlew.bat vendored Normal file
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@ -0,0 +1,90 @@
@if "%DEBUG%" == "" @echo off
@rem ##########################################################################
@rem
@rem Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS=
set DIRNAME=%~dp0
if "%DIRNAME%" == "" set DIRNAME=.
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%
@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome
set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if "%ERRORLEVEL%" == "0" goto init
echo.
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
if exist "%JAVA_EXE%" goto init
echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:init
@rem Get command-line arguments, handling Windowz variants
if not "%OS%" == "Windows_NT" goto win9xME_args
if "%@eval[2+2]" == "4" goto 4NT_args
:win9xME_args
@rem Slurp the command line arguments.
set CMD_LINE_ARGS=
set _SKIP=2
:win9xME_args_slurp
if "x%~1" == "x" goto execute
set CMD_LINE_ARGS=%*
goto execute
:4NT_args
@rem Get arguments from the 4NT Shell from JP Software
set CMD_LINE_ARGS=%$
:execute
@rem Setup the command line
set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
:end
@rem End local scope for the variables with windows NT shell
if "%ERRORLEVEL%"=="0" goto mainEnd
:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
exit /b 1
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega

85
complete/pom.xml
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@ -1,61 +1,60 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.springframework</groupId>
<artifactId>gs-batch-processing-complete</artifactId>
<version>0.1.0</version>
<groupId>org.springframework</groupId>
<artifactId>gs-batch-processing</artifactId>
<version>0.1.0</version>
<parent>
<groupId>org.springframework.bootstrap</groupId>
<artifactId>spring-bootstrap-starters</artifactId>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>0.5.0.BUILD-SNAPSHOT</version>
</parent>
<dependencies>
<dependencies>
<dependency>
<groupId>org.springframework.bootstrap</groupId>
<artifactId>spring-bootstrap-batch-starter</artifactId>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-batch</artifactId>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
</dependency>
</dependencies>
</dependencies>
<!-- {!begin#shade-config} -->
<properties>
<start-class>hello.BatchConfiguration</start-class>
</properties>
<properties>
<start-class>hello.BatchConfiguration</start-class>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
</plugin>
</plugins>
</build>
<!-- {!end#shade-config} -->
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-snapshots</id>
<url>http://repo.springsource.org/libs-snapshot</url>
<snapshots><enabled>true</enabled></snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<url>http://repo.springsource.org/libs-snapshot</url>
<snapshots><enabled>true</enabled></snapshots>
</pluginRepository>
</pluginRepositories>
<repositories>
<repository>
<id>spring-snapshots</id>
<url>http://repo.springsource.org/snapshot</url>
<snapshots><enabled>true</enabled></snapshots>
</repository>
<repository>
<id>spring-milestones</id>
<url>http://repo.springsource.org/milestone</url>
<snapshots><enabled>true</enabled></snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<url>http://repo.springsource.org/snapshot</url>
<snapshots><enabled>true</enabled></snapshots>
</pluginRepository>
</pluginRepositories>
</project>

136
complete/src/main/java/hello/BatchConfiguration.java
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@ -6,6 +6,7 @@ import java.util.List;
import javax.sql.DataSource;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.batch.core.Job;
import org.springframework.batch.core.Step;
import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
@ -21,8 +22,7 @@ import org.springframework.batch.item.file.FlatFileItemReader;
import org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper;
import org.springframework.batch.item.file.mapping.DefaultLineMapper;
import org.springframework.batch.item.file.transform.DelimitedLineTokenizer;
import org.springframework.bootstrap.SpringApplication;
import org.springframework.bootstrap.context.annotation.EnableAutoConfiguration;
import org.springframework.boot.SpringApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@ -35,76 +35,76 @@ import org.springframework.jdbc.core.RowMapper;
@EnableAutoConfiguration
public class BatchConfiguration {
// {!begin#reader-writer-processor}
@Bean
public ItemReader<Person> reader() {
FlatFileItemReader<Person> reader = new FlatFileItemReader<Person>();
reader.setResource(new ClassPathResource("sample-data.csv"));
reader.setLineMapper(new DefaultLineMapper<Person>() {{
setLineTokenizer(new DelimitedLineTokenizer() {{
setNames(new String[] { "firstName", "lastName" });
}});
setFieldSetMapper(new BeanWrapperFieldSetMapper<Person>() {{
setTargetType(Person.class);
}});
}});
return reader;
}
// {!begin readerwriterprocessor}
@Bean
public ItemReader<Person> reader() {
FlatFileItemReader<Person> reader = new FlatFileItemReader<Person>();
reader.setResource(new ClassPathResource("sample-data.csv"));
reader.setLineMapper(new DefaultLineMapper<Person>() {{
setLineTokenizer(new DelimitedLineTokenizer() {{
setNames(new String[] { "firstName", "lastName" });
}});
setFieldSetMapper(new BeanWrapperFieldSetMapper<Person>() {{
setTargetType(Person.class);
}});
}});
return reader;
}
@Bean
public ItemProcessor<Person, Person> processor() {
return new PersonItemProcessor();
}
@Bean
public ItemProcessor<Person, Person> processor() {
return new PersonItemProcessor();
}
@Bean
public ItemWriter<Person> writer(DataSource dataSource) {
JdbcBatchItemWriter<Person> writer = new JdbcBatchItemWriter<Person>();
writer.setItemSqlParameterSourceProvider(new BeanPropertyItemSqlParameterSourceProvider<Person>());
writer.setSql("INSERT INTO people (first_name, last_name) VALUES (:firstName, :lastName)");
writer.setDataSource(dataSource);
return writer;
}
// {!end#reader-writer-processor}
@Bean
public ItemWriter<Person> writer(DataSource dataSource) {
JdbcBatchItemWriter<Person> writer = new JdbcBatchItemWriter<Person>();
writer.setItemSqlParameterSourceProvider(new BeanPropertyItemSqlParameterSourceProvider<Person>());
writer.setSql("INSERT INTO people (first_name, last_name) VALUES (:firstName, :lastName)");
writer.setDataSource(dataSource);
return writer;
}
// {!end readerwriterprocessor}
// {!begin#job-step}
@Bean
public Job importUserJob(JobBuilderFactory jobs, Step s1) {
return jobs.get("importUserJob")
.incrementer(new RunIdIncrementer())
.flow(s1)
.end()
.build();
}
// {!begin jobstep}
@Bean
public Job importUserJob(JobBuilderFactory jobs, Step s1) {
return jobs.get("importUserJob")
.incrementer(new RunIdIncrementer())
.flow(s1)
.end()
.build();
}
@Bean
public Step step1(StepBuilderFactory stepBuilderFactory, ItemReader<Person> reader,
ItemWriter<Person> writer, ItemProcessor<Person, Person> processor) {
return stepBuilderFactory.get("step1")
.<Person, Person> chunk(10)
.reader(reader)
.processor(processor)
.writer(writer)
.build();
}
// {!end#job-step}
@Bean
public Step step1(StepBuilderFactory stepBuilderFactory, ItemReader<Person> reader,
ItemWriter<Person> writer, ItemProcessor<Person, Person> processor) {
return stepBuilderFactory.get("step1")
.<Person, Person> chunk(10)
.reader(reader)
.processor(processor)
.writer(writer)
.build();
}
// {!end jobstep}
// {!begin#template-main}
@Bean
public JdbcTemplate jdbcTemplate(DataSource dataSource) {
return new JdbcTemplate(dataSource);
}
// {!begin templatemain}
@Bean
public JdbcTemplate jdbcTemplate(DataSource dataSource) {
return new JdbcTemplate(dataSource);
}
public static void main(String[] args) {
ApplicationContext ctx = SpringApplication.run(BatchConfiguration.class, args);
List<Person> results = ctx.getBean(JdbcTemplate.class).query("SELECT first_name, last_name FROM people", new RowMapper<Person>() {
@Override
public Person mapRow(ResultSet rs, int row) throws SQLException {
return new Person(rs.getString(1), rs.getString(2));
}
});
for (Person person : results) {
System.out.println("Found <" + person + "> in the database.");
}
}
// {!end#template-main}
public static void main(String[] args) {
ApplicationContext ctx = SpringApplication.run(BatchConfiguration.class, args);
List<Person> results = ctx.getBean(JdbcTemplate.class).query("SELECT first_name, last_name FROM people", new RowMapper<Person>() {
@Override
public Person mapRow(ResultSet rs, int row) throws SQLException {
return new Person(rs.getString(1), rs.getString(2));
}
});
for (Person person : results) {
System.out.println("Found <" + person + "> in the database.");
}
}
// {!end templatemain}
}

19
complete/src/main/java/hello/Person.java
View File

@ -8,14 +8,14 @@ public class Person {
}
public Person(String firstName, String lastName) {
this.firstName = firstName;
this.lastName = lastName;
}
public Person(String firstName, String lastName) {
this.firstName = firstName;
this.lastName = lastName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getFirstName() {
return firstName;
@ -26,11 +26,12 @@ public class Person {
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
this.lastName = lastName;
}
@Override
public String toString() {
return "firstName: " + firstName + ", lastName: " + lastName;
}
}

2
complete/src/main/java/hello/PersonItemProcessor.java
View File

@ -3,6 +3,7 @@ package hello;
import org.springframework.batch.item.ItemProcessor;
public class PersonItemProcessor implements ItemProcessor<Person, Person> {
@Override
public Person process(final Person person) throws Exception {
final String firstName = person.getFirstName().toUpperCase();
@ -14,4 +15,5 @@ public class PersonItemProcessor implements ItemProcessor<Person, Person> {
return transformedPerson;
}
}

7
complete/src/main/resources/schema-all.sql Normal file
View File

@ -0,0 +1,7 @@
DROP TABLE people IF EXISTS;
CREATE TABLE people (
person_id BIGINT IDENTITY NOT NULL PRIMARY KEY,
first_name VARCHAR(20),
last_name VARCHAR(20)
);

7
complete/src/main/resources/schema.sql
View File

@ -1,7 +0,0 @@
DROP TABLE people IF EXISTS;
CREATE TABLE people (
person_id BIGINT IDENTITY NOT NULL PRIMARY KEY,
first_name VARCHAR(20),
last_name VARCHAR(20)
);

33
initial/build.gradle Normal file
View File

@ -0,0 +1,33 @@
buildscript {
repositories {
maven { url "http://repo.springsource.org/libs-snapshot" }
mavenLocal()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:0.5.0.BUILD-SNAPSHOT")
}
}
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'idea'
jar {
baseName = 'gs-batch-processing'
version = '0.1.0'
}
repositories {
mavenCentral()
maven { url "http://repo.springsource.org/libs-snapshot" }
}
dependencies {
compile("org.springframework.boot:spring-boot-starter-batch:0.5.0.BUILD-SNAPSHOT")
compile("org.hsqldb:hsqldb")
testCompile("junit:junit:4.11")
}
task wrapper(type: Wrapper) {
gradleVersion = '1.7'
}

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initial/gradle/wrapper/gradle-wrapper.jar vendored Normal file
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6
initial/gradle/wrapper/gradle-wrapper.properties vendored Normal file
View File

@ -0,0 +1,6 @@
#Fri Aug 09 11:38:32 CDT 2013
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=http\://services.gradle.org/distributions/gradle-1.7-bin.zip

164
initial/gradlew vendored Executable file
View File

@ -0,0 +1,164 @@
#!/usr/bin/env bash
##############################################################################
##
## Gradle start up script for UN*X
##
##############################################################################
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS=""
APP_NAME="Gradle"
APP_BASE_NAME=`basename "$0"`
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD="maximum"
warn ( ) {
echo "$*"
}
die ( ) {
echo
echo "$*"
echo
exit 1
}
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
case "`uname`" in
CYGWIN* )
cygwin=true
;;
Darwin* )
darwin=true
;;
MINGW* )
msys=true
;;
esac
# For Cygwin, ensure paths are in UNIX format before anything is touched.
if $cygwin ; then
[ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
fi
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
PRG="$0"
# Need this for relative symlinks.
while [ -h "$PRG" ] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> \(.*\)$'`
if expr "$link" : '/.*' > /dev/null; then
PRG="$link"
else
PRG=`dirname "$PRG"`"/$link"
fi
done
SAVED="`pwd`"
cd "`dirname \"$PRG\"`/" >&-
APP_HOME="`pwd -P`"
cd "$SAVED" >&-
CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD="$JAVA_HOME/jre/sh/java"
else
JAVACMD="$JAVA_HOME/bin/java"
fi
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD="java"
which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
# Increase the maximum file descriptors if we can.
if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
MAX_FD_LIMIT=`ulimit -H -n`
if [ $? -eq 0 ] ; then
if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
MAX_FD="$MAX_FD_LIMIT"
fi
ulimit -n $MAX_FD
if [ $? -ne 0 ] ; then
warn "Could not set maximum file descriptor limit: $MAX_FD"
fi
else
warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
fi
fi
# For Darwin, add options to specify how the application appears in the dock
if $darwin; then
GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
fi
# For Cygwin, switch paths to Windows format before running java
if $cygwin ; then
APP_HOME=`cygpath --path --mixed "$APP_HOME"`
CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
# We build the pattern for arguments to be converted via cygpath
ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
SEP=""
for dir in $ROOTDIRSRAW ; do
ROOTDIRS="$ROOTDIRS$SEP$dir"
SEP="|"
done
OURCYGPATTERN="(^($ROOTDIRS))"
# Add a user-defined pattern to the cygpath arguments
if [ "$GRADLE_CYGPATTERN" != "" ] ; then
OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
fi
# Now convert the arguments - kludge to limit ourselves to /bin/sh
i=0
for arg in "$@" ; do
CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
else
eval `echo args$i`="\"$arg\""
fi
i=$((i+1))
done
case $i in
(0) set -- ;;
(1) set -- "$args0" ;;
(2) set -- "$args0" "$args1" ;;
(3) set -- "$args0" "$args1" "$args2" ;;
(4) set -- "$args0" "$args1" "$args2" "$args3" ;;
(5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
(6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
(7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
(8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
(9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
esac
fi
# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
function splitJvmOpts() {
JVM_OPTS=("$@")
}
eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"

90
initial/gradlew.bat vendored Normal file
View File

@ -0,0 +1,90 @@
@if "%DEBUG%" == "" @echo off
@rem ##########################################################################
@rem
@rem Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS=
set DIRNAME=%~dp0
if "%DIRNAME%" == "" set DIRNAME=.
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%
@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome
set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if "%ERRORLEVEL%" == "0" goto init
echo.
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
if exist "%JAVA_EXE%" goto init
echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:init
@rem Get command-line arguments, handling Windowz variants
if not "%OS%" == "Windows_NT" goto win9xME_args
if "%@eval[2+2]" == "4" goto 4NT_args
:win9xME_args
@rem Slurp the command line arguments.
set CMD_LINE_ARGS=
set _SKIP=2
:win9xME_args_slurp
if "x%~1" == "x" goto execute
set CMD_LINE_ARGS=%*
goto execute
:4NT_args
@rem Get arguments from the 4NT Shell from JP Software
set CMD_LINE_ARGS=%$
:execute
@rem Setup the command line
set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
:end
@rem End local scope for the variables with windows NT shell
if "%ERRORLEVEL%"=="0" goto mainEnd
:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
exit /b 1
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega

66
initial/pom.xml
View File

@ -1,46 +1,52 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.springframework</groupId>
<artifactId>gs-batch-processing-initial</artifactId>
<version>0.1.0</version>
<groupId>org.springframework</groupId>
<artifactId>gs-batch-processing</artifactId>
<version>0.1.0</version>
<parent>
<groupId>org.springframework.bootstrap</groupId>
<artifactId>spring-bootstrap-starters</artifactId>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>0.5.0.BUILD-SNAPSHOT</version>
</parent>
<dependencies>
<dependencies>
<dependency>
<groupId>org.springframework.bootstrap</groupId>
<artifactId>spring-bootstrap-batch-starter</artifactId>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-batch</artifactId>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
</dependency>
</dependencies>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-snapshots</id>
<url>http://repo.springsource.org/libs-snapshot</url>
<snapshots><enabled>true</enabled></snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<url>http://repo.springsource.org/libs-snapshot</url>
<snapshots><enabled>true</enabled></snapshots>
</pluginRepository>
</pluginRepositories>
<repositories>
<repository>
<id>spring-snapshots</id>
<url>http://repo.springsource.org/snapshot</url>
<snapshots><enabled>true</enabled></snapshots>
</repository>
<repository>
<id>spring-milestones</id>
<url>http://repo.springsource.org/milestone</url>
<snapshots><enabled>true</enabled></snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<url>http://repo.springsource.org/snapshot</url>
<snapshots><enabled>true</enabled></snapshots>
</pluginRepository>
</pluginRepositories>
</project>

7
initial/src/main/resources/schema-all.sql Normal file
View File

@ -0,0 +1,7 @@
DROP TABLE people IF EXISTS;
CREATE TABLE people (
person_id BIGINT IDENTITY NOT NULL PRIMARY KEY,
first_name VARCHAR(20),
last_name VARCHAR(20)
);

7
initial/src/main/resources/schema.sql
View File

@ -1,7 +0,0 @@
DROP TABLE people IF EXISTS;
CREATE TABLE people (
person_id BIGINT IDENTITY NOT NULL PRIMARY KEY,
first_name VARCHAR(20),
last_name VARCHAR(20)
);

36
test/run.sh Executable file
View File

@ -0,0 +1,36 @@
#!/bin/sh
cd $(dirname $0)
cd ../complete
mvn clean package
ret=$?
if [ $ret -ne 0 ]; then
exit $ret
fi
rm -rf target
./gradlew build
ret=$?
if [ $ret -ne 0 ]; then
exit $ret
fi
rm -rf build
cd ../initial
mvn clean package
ret=$?
if [ $ret -ne 0 ]; then
exit $ret
fi
rm -rf target
./gradlew build
ret=$?
if [ $ret -ne 0 ]; then
exit $ret
fi
rm -rf build
exit