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[BAEL-2899] adding more information and changing methods names

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Gian Mario Contessa 2019-06-09 21:18:13 +01:00
parent 9e0e8a6b0b
commit dd69f71a9c
2 changed files with 37 additions and 22 deletions
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8
core-groovy-2/src/main/groovy/com/baeldung/CalcScript.groovy
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@ -5,6 +5,12 @@ def calcSum(x, y) {
} }
def calcSum2(x, y) { def calcSum2(x, y) {
// DANGER! This won't throw a compilation issue and fail only at runtime!!! // DANGER! The variable "log" may be undefined
log.info "Executing $x + $y"
// DANGER! This method doesn't exist!
calcSum3() calcSum3()
// DANGER! The logged variable "z" is undefined!
log.info("Logging an undefined variable: $z")
} }
calcSum(1,5)

51
core-groovy-2/src/main/java/com/baeldung/MyJointCompilationApp.java
View File

@ -40,7 +40,7 @@ public class MyJointCompilationApp {
engineFromFactory = new GroovyScriptEngineFactory().getScriptEngine(); engineFromFactory = new GroovyScriptEngineFactory().getScriptEngine();
} }
private void runCompiledClasses(int x, int y) { private void addWithCompiledClasses(int x, int y) {
LOG.info("Executing {} + {}", x, y); LOG.info("Executing {} + {}", x, y);
Object result1 = new CalcScript().calcSum(x, y); Object result1 = new CalcScript().calcSum(x, y);
LOG.info("Result of CalcScript.calcSum() method is {}", result1); LOG.info("Result of CalcScript.calcSum() method is {}", result1);
@ -49,14 +49,21 @@ public class MyJointCompilationApp {
LOG.info("Result of CalcMath.calcSum() method is {}", result2); LOG.info("Result of CalcMath.calcSum() method is {}", result2);
} }
private void runDynamicShellScript(int x, int y) throws IOException { private void addWithGroovyShell(int x, int y) throws IOException {
Script script = shell.parse(new File("src/main/groovy/com/baeldung/", "CalcScript.groovy")); Script script = shell.parse(new File("src/main/groovy/com/baeldung/", "CalcScript.groovy"));
LOG.info("Executing {} + {}", x, y); LOG.info("Executing {} + {}", x, y);
Object result = script.invokeMethod("calcSum", new Object[] { x, y }); Object result = script.invokeMethod("calcSum", new Object[] { x, y });
LOG.info("Result of CalcScript.calcSum() method is {}", result); LOG.info("Result of CalcScript.calcSum() method is {}", result);
} }
private void runDynamicClassWithLoader(int x, int y) throws IllegalAccessException, InstantiationException, IOException { private void addWithGroovyShellRun() throws IOException {
Script script = shell.parse(new File("src/main/groovy/com/baeldung/", "CalcScript.groovy"));
LOG.info("Executing script run method");
Object result = script.run();
LOG.info("Result of CalcScript.run() method is {}", result);
}
private void addWithGroovyClassLoader(int x, int y) throws IllegalAccessException, InstantiationException, IOException {
Class calcClass = loader.parseClass( Class calcClass = loader.parseClass(
new File("src/main/groovy/com/baeldung/", "CalcMath.groovy")); new File("src/main/groovy/com/baeldung/", "CalcMath.groovy"));
GroovyObject calc = (GroovyObject) calcClass.newInstance(); GroovyObject calc = (GroovyObject) calcClass.newInstance();
@ -64,9 +71,8 @@ public class MyJointCompilationApp {
LOG.info("Result of CalcMath.calcSum() method is {}", result); LOG.info("Result of CalcMath.calcSum() method is {}", result);
} }
private void runDynamicClassWithEngine(int x, int y) throws IllegalAccessException, private void addWithGroovyScriptEngine(int x, int y) throws IllegalAccessException,
InstantiationException, ResourceException, ScriptException { InstantiationException, ResourceException, ScriptException {
Class<GroovyObject> calcClass = engine.loadScriptByName("CalcMath.groovy"); Class<GroovyObject> calcClass = engine.loadScriptByName("CalcMath.groovy");
GroovyObject calc = calcClass.newInstance(); GroovyObject calc = calcClass.newInstance();
//WARNING the following will throw a ClassCastException //WARNING the following will throw a ClassCastException
@ -75,37 +81,40 @@ public class MyJointCompilationApp {
LOG.info("Result of CalcMath.calcSum() method is {}", result); LOG.info("Result of CalcMath.calcSum() method is {}", result);
} }
private void runDynamicClassWithEngineFactory(int x, int y) throws IllegalAccessException, private void addWithEngineFactory(int x, int y) throws IllegalAccessException,
InstantiationException, javax.script.ScriptException, FileNotFoundException { InstantiationException, javax.script.ScriptException, FileNotFoundException {
Class calcClas = (Class) engineFromFactory.eval( Class calcClass = (Class) engineFromFactory.eval(
new FileReader(new File("src/main/groovy/com/baeldung/", "CalcMath.groovy"))); new FileReader(new File("src/main/groovy/com/baeldung/", "CalcMath.groovy")));
GroovyObject calc = (GroovyObject) calcClas.newInstance(); GroovyObject calc = (GroovyObject) calcClass.newInstance();
Object result = calc.invokeMethod("calcSum", new Object[] { x, y }); Object result = calc.invokeMethod("calcSum", new Object[] { x, y });
LOG.info("Result of CalcMath.calcSum() method is {}", result); LOG.info("Result of CalcMath.calcSum() method is {}", result);
} }
private void runStaticCompiledClasses() { private void addWithStaticCompiledClasses() {
LOG.info("Running the Groovy classes compiled statically..."); LOG.info("Running the Groovy classes compiled statically...");
runCompiledClasses(5, 10); addWithCompiledClasses(5, 10);
} }
private void runDynamicCompiledClasses() throws IOException, IllegalAccessException, InstantiationException, private void addWithDynamicCompiledClasses() throws IOException, IllegalAccessException, InstantiationException,
ResourceException, ScriptException, javax.script.ScriptException { ResourceException, ScriptException, javax.script.ScriptException {
LOG.info("Running a dynamic groovy script..."); LOG.info("Invocation of a dynamic groovy script...");
runDynamicShellScript(5, 10); addWithGroovyShell(5, 10);
LOG.info("Running a dynamic groovy class with GroovyClassLoader..."); LOG.info("Invocation of the run method of a dynamic groovy script...");
runDynamicClassWithLoader(10, 30); addWithGroovyShellRun();
LOG.info("Running a dynamic groovy class with GroovyScriptEngine..."); LOG.info("Invocation of a dynamic groovy class loaded with GroovyClassLoader...");
runDynamicClassWithEngine(15, 0); addWithGroovyClassLoader(10, 30);
LOG.info("Running a dynamic groovy class with GroovyScriptEngine JSR223..."); LOG.info("Invocation of a dynamic groovy class loaded with GroovyScriptEngine...");
runDynamicClassWithEngineFactory(5, 6); addWithGroovyScriptEngine(15, 0);
LOG.info("Invocation of a dynamic groovy class loaded with GroovyScriptEngine JSR223...");
addWithEngineFactory(5, 6);
} }
public static void main(String[] args) throws InstantiationException, IllegalAccessException, public static void main(String[] args) throws InstantiationException, IllegalAccessException,
ResourceException, ScriptException, IOException, javax.script.ScriptException { ResourceException, ScriptException, IOException, javax.script.ScriptException {
MyJointCompilationApp myJointCompilationApp = new MyJointCompilationApp(); MyJointCompilationApp myJointCompilationApp = new MyJointCompilationApp();
myJointCompilationApp.runStaticCompiledClasses(); LOG.info("Example of addition operation via Groovy scripts integration with Java.");
myJointCompilationApp.runDynamicCompiledClasses(); myJointCompilationApp.addWithStaticCompiledClasses();
myJointCompilationApp.addWithDynamicCompiledClasses();
} }
} }