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com.disney.groovity.GroovityBuilder Maven / Gradle / Ivy
/*******************************************************************************
* © 2018 Disney | ABC Television Group
*
* Licensed under the Apache License, Version 2.0 (the "Apache License")
* with the following modification; you may not use this file except in
* compliance with the Apache License and the following modification to it:
* Section 6. Trademarks. is deleted and replaced with:
*
* 6. Trademarks. This License does not grant permission to use the trade
* names, trademarks, service marks, or product names of the Licensor
* and its affiliates, except as required to comply with Section 4(c) of
* the License and to reproduce the content of the NOTICE file.
*
* You may obtain a copy of the Apache License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the Apache License with the above modification is
* distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the Apache License for the specific
* language governing permissions and limitations under the Apache License.
*******************************************************************************/
package com.disney.groovity;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.EnumSet;
import java.util.List;
import java.util.Map;
import java.util.ServiceLoader;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.atomic.AtomicReference;
import org.apache.http.impl.client.HttpClientBuilder;
import com.disney.groovity.conf.Configurator;
import com.disney.groovity.conf.EnvConfigurator;
import com.disney.groovity.conf.MultiConfigurator;
import com.disney.groovity.conf.PropertiesFileConfigurator;
import com.disney.groovity.conf.PropertiesResourceConfigurator;
import com.disney.groovity.conf.PropertiesURLConfigurator;
import com.disney.groovity.conf.SystemConfigurator;
import com.disney.groovity.source.AbstractGroovitySourceLocator;
import com.disney.groovity.source.ClasspathGroovitySourceLocator;
import com.disney.groovity.source.FileGroovitySourceLocator;
import com.disney.groovity.source.GroovitySourceLocator;
import com.disney.groovity.source.HttpGroovitySourceLocator;
/**
* A fluent builder API to configure and instantiate a Groovity. Each of the setter
* methods has comments describing the purpose of that option.
*
* @author Alex Vigdor
*
*/
public class GroovityBuilder {
private ArgsLookup argsLookup = null;
private int asyncThreads = 128;
private Map defaultBinding;
private BindingDecorator bindingDecorator;
private boolean caseSensitive = true;
private int maxHttpConnPerRoute = 128;
private int maxHttpConnTotal = 512;
private File jarDirectory = null;
private EnumSet sourcePhases = EnumSet.of(GroovityPhase.STARTUP);
private EnumSet jarPhases = EnumSet.of(GroovityPhase.STARTUP);
private Collection sourceLocations = null;
private Collection sourceLocators = null;
private int sourcePollSeconds = -1;
private String scriptBaseClass = "com.disney.groovity.GroovityScript";
private HttpClientBuilder httpClientBuilder = HttpClientBuilder.create().useSystemProperties();
private ClassLoader parentClassLoader;
private Configurator configurator;
private String propsResource;
private File propsFile;
private URL propsURL;
public Map getDefaultBinding() {
return defaultBinding;
}
/**
* Add a map of default binding values to be provided to all scripts in this groovity
*
* @param defaultBinding
* @return
*/
public GroovityBuilder setDefaultBinding(Map defaultBinding) {
this.defaultBinding = defaultBinding;
return this;
}
public int getAsyncThreads() {
return asyncThreads;
}
/**
* Set the maximum number of threads available for async HTTP client calls
*
* @param asyncThreads
* @return
*/
public GroovityBuilder setAsyncThreads(int asyncThreads) {
this.asyncThreads = asyncThreads;
return this;
}
public boolean isCaseSensitive() {
return caseSensitive;
}
/**
* Set to false to enable case insensitive paths for loading and running scripts
* @param caseSensitive
* @return
*/
public GroovityBuilder setCaseSensitive(boolean caseSensitive) {
this.caseSensitive = caseSensitive;
return this;
}
public int getMaxHttpConnPerRoute() {
return maxHttpConnPerRoute;
}
/**
* Set the maximum number of http client connections per route
*
* @param maxHttpConnPerRoute
* @return
*/
public GroovityBuilder setMaxHttpConnPerRoute(int maxHttpConnPerRoute) {
this.maxHttpConnPerRoute = maxHttpConnPerRoute;
return this;
}
public int getMaxHttpConnTotal() {
return maxHttpConnTotal;
}
/**
* Set max total number of simultaneous http client connections
* @param maxHttpConnTotal
* @return
*/
public GroovityBuilder setMaxHttpConnTotal(int maxHttpConnTotal) {
this.maxHttpConnTotal = maxHttpConnTotal;
return this;
}
public File getJarDirectory() {
return jarDirectory;
}
/**
* Define the directory where JAR files are read/written (according to JarPhases)
* @param jarDirectory
* @return
*/
public GroovityBuilder setJarDirectory(File jarDirectory) {
this.jarDirectory = jarDirectory;
return this;
}
public EnumSet getSourcePhases() {
return sourcePhases;
}
/**
* Set source phases (STARTUP = compile from source at startup, RUNTIME = automatically compile changes at runtime)
* @param sourcePhases
* @return
*/
public GroovityBuilder setSourcePhases(EnumSet sourcePhases) {
this.sourcePhases = sourcePhases;
return this;
}
public EnumSet getJarPhases() {
return jarPhases;
}
/**
* Set jar phases (STARTUP = read from JAR files at startup, RUNTIME = write out JAR files during compilation)
* @param jarPhases
* @return
*/
public GroovityBuilder setJarPhases(EnumSet jarPhases) {
this.jarPhases = jarPhases;
return this;
}
/**
* Convenience method for setting source phases as a String, full support = "STARTUP,RUNTIME"
* @param phases
* @return
*/
public GroovityBuilder setSourcePhase(String phases){
String[] ph = phases.split("\\s*,\\s*");
EnumSet es = EnumSet.noneOf(GroovityPhase.class);
if(ph[0].length()>0){
for(String p: ph){
es.add(GroovityPhase.valueOf(p));
}
}
sourcePhases=es;
return this;
}
/**
* Convenience method for setting jar phases as a string, full JAR support = "STARTUP,RUNTIME"
* @param phases
* @return
*/
public GroovityBuilder setJarPhase(String phases){
String[] ph = phases.split("\\s*,\\s*");
EnumSet es = EnumSet.noneOf(GroovityPhase.class);
if(ph[0].length()>0){
for(String p: ph){
es.add(GroovityPhase.valueOf(p));
}
}
jarPhases=es;
return this;
}
public Collection getSourceLocations() {
return sourceLocations;
}
/**
* Set locations where source files can be listed and retrieved
*
* @param sourceLocations
* @return
*/
public GroovityBuilder setSourceLocations(Collection sourceLocations) {
this.sourceLocations = sourceLocations;
return this;
}
/**
* Set file or HTTP locations where source files can be listed and retrieved
*
* @param sourceLocations
* @return
*/
public GroovityBuilder setSourceLocations(URI... sourceLocations) {
this.sourceLocations = Arrays.asList(sourceLocations);
return this;
}
/**
* After setting all initialization parameters, call build() to construct, initialize and return the fully started Groovity
*
* @return an initialized Groovity
* @throws IllegalAccessException
* @throws IllegalArgumentException
* @throws InvocationTargetException
* @throws IOException
* @throws URISyntaxException
*/
public Groovity build() throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, IOException, URISyntaxException{
return build(true);
}
/**
* After setting all initialization parameters, call build(true) to construct, initialize and return the fully started Groovity,
* or build(false) to initialize the Groovity without starting (e.g. to just build jar files without initing and starting classes)
*
* @return an initialized Groovity
* @throws IllegalAccessException
* @throws IllegalArgumentException
* @throws InvocationTargetException
* @throws IOException
* @throws URISyntaxException
*/
public Groovity build(boolean start) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, IOException, URISyntaxException{
CopyOnWriteArrayList configurators = new CopyOnWriteArrayList();
if(propsResource!=null){
configurators.add(new PropertiesResourceConfigurator(propsResource));
}
if(propsFile!=null){
configurators.add(new PropertiesFileConfigurator(propsFile));
}
if(propsURL!=null){
configurators.add(new PropertiesURLConfigurator(propsURL));
}
configurators.add(new EnvConfigurator());
configurators.add(new SystemConfigurator());
if(configurator!=null){
configurators.add(configurator);
}
Groovity groovity = new Groovity();
groovity.setJarDirectory(jarDirectory);
groovity.setJarPhases(jarPhases);
groovity.setSourcePhases(sourcePhases);
groovity.setCaseSensitive(caseSensitive);
groovity.setArgsLookup(argsLookup);
groovity.setAsyncThreads(asyncThreads);
groovity.setScriptBaseClass(scriptBaseClass);
groovity.setParentLoader(parentClassLoader);
groovity.setConfigurator(new MultiConfigurator(configurators));
final AtomicReference bindingDecoratorRef = new AtomicReference(bindingDecorator);
if(defaultBinding!=null){
bindingDecoratorRef.set(new BindingMapDecorator(new ConcurrentHashMap(defaultBinding),bindingDecoratorRef.get()));
}
ServiceLoader.load(BindingDecorator.class).forEach(decorator ->{
decorator.setChainedDecorator(bindingDecoratorRef.get());
bindingDecoratorRef.set(decorator);
});
groovity.setBindingDecorator(bindingDecoratorRef.get());
if(httpClientBuilder==null){
httpClientBuilder = HttpClientBuilder.create().useSystemProperties();
}
if(maxHttpConnPerRoute>0){
httpClientBuilder.setMaxConnPerRoute(maxHttpConnPerRoute);
}
if(maxHttpConnTotal>0){
httpClientBuilder.setMaxConnTotal(maxHttpConnTotal);
}
groovity.setHttpClient(httpClientBuilder.build());
List locators = new ArrayList();
if(sourceLocators!=null){
for(GroovitySourceLocator locator: sourceLocators){
locators.add(locator);
}
}
if(sourceLocations!=null){
for(URI location: sourceLocations){
AbstractGroovitySourceLocator sourceLocator = null;
String scheme = location.getScheme();
if(scheme!=null){
scheme = scheme.toLowerCase();
if(scheme.startsWith("http")){
sourceLocator = new HttpGroovitySourceLocator(location);
}
else if(scheme.equals("classpath")){
sourceLocator = new ClasspathGroovitySourceLocator(location.getPath());
}
}
if(sourceLocator==null){
//file locator
if(location.isAbsolute()){
sourceLocator = new FileGroovitySourceLocator(new File(location));
}
else{
sourceLocator = new FileGroovitySourceLocator(new File(location.getPath()));
}
}
sourceLocator.setInterval(sourcePollSeconds);
locators.add(sourceLocator);
}
}
groovity.setSourceLocators(locators.toArray(new GroovitySourceLocator[0]));
if(start) {
groovity.start();
}
else {
groovity.init(false);
}
return groovity;
}
public int getSourcePollSeconds() {
return sourcePollSeconds;
}
/**
* If RUNTIME source phase is enabled, controls how frequently this Groovity will poll locators for source changes
* @param sourcePollSeconds
* @return
*/
public GroovityBuilder setSourcePollSeconds(int sourcePollSeconds) {
this.sourcePollSeconds = sourcePollSeconds;
return this;
}
public String getScriptBaseClass() {
return scriptBaseClass;
}
/**
* Specify a base class for groovity scripts, defaults to core groovy Script
*
* @param scriptBaseClass
* @return
*/
public GroovityBuilder setScriptBaseClass(String scriptBaseClass) {
this.scriptBaseClass = scriptBaseClass;
return this;
}
public BindingDecorator getBindingDecorator() {
return bindingDecorator;
}
/**
* Define a binding decorator to use with scripts compiled in this Groovity
*
* @param bindingDecorator
* @return
*/
public GroovityBuilder setBindingDecorator(BindingDecorator bindingDecorator) {
this.bindingDecorator = bindingDecorator;
return this;
}
public HttpClientBuilder getHttpClientBuilder() {
return httpClientBuilder;
}
/**
* Pass in a custom HTTPClientBuilder in order to tailor HTTP client behavior, e.g. to add ehcache or custom interceptors
*
* @param httpClientBuilder
* @return
*/
public GroovityBuilder setHttpClientBuilder(HttpClientBuilder httpClientBuilder) {
this.httpClientBuilder = httpClientBuilder;
return this;
}
public ClassLoader getParentClassLoader() {
return parentClassLoader;
}
/**
* Provide a custom parent classloader that all groovity script loaders will inherit from.
*
* @param parentClassLoader
* @return
*/
public GroovityBuilder setParentClassLoader(ClassLoader parentClassLoader) {
this.parentClassLoader = parentClassLoader;
return this;
}
public Collection getSourceLocators() {
return sourceLocators;
}
/**
* Set the GroovitySourceLocators used by this groovity, a lower-level alternative to providing source URIs
*
* @param sourceLocators
* @return
*/
public GroovityBuilder setSourceLocators(Collection sourceLocators) {
this.sourceLocators = sourceLocators;
return this;
}
public Configurator getConfigurator() {
return configurator;
}
/**
* Attach a configurator to this Groovity to provide configuration data to scripts
*
* @param configurator
* @return
*/
public GroovityBuilder setConfigurator(Configurator configurator) {
this.configurator = configurator;
return this;
}
public String getPropsResource() {
return propsResource;
}
/**
* Set a classpath properties file location that acts a source of configuration values for groovity conf blocks
* @param propsResource
* @return
*/
public GroovityBuilder setPropsResource(String propsResource) {
this.propsResource = propsResource;
return this;
}
public File getPropsFile() {
return propsFile;
}
/**
* Set a properties file that acts a source of configuration values for groovity conf blocks
*
* @param propsFile
* @return
*/
public GroovityBuilder setPropsFile(File propsFile) {
this.propsFile = propsFile;
return this;
}
/**
* Set an arbitrary URL for a properties file that acts a source of configuration values for groovity conf blocks
*
* @param propsUrl
* @return
*/
public GroovityBuilder setPropsUrl(URL propsUrl) {
this.propsURL=propsUrl;
return this;
}
public ArgsLookup getArgsLookup() {
return argsLookup;
}
/**
* Define the ArgsLookup implementation to use for this groovity
*
* @param argsLookup
* @return
*/
public GroovityBuilder setArgsLookup(ArgsLookup argsLookup) {
this.argsLookup = argsLookup;
return this;
}
}