Send a report via Email

development.properties

vraptor.simplemail.main.server = smtp.gmail.com
vraptor.simplemail.main.port = 587
vraptor.simplemail.main.tls = true
vraptor.simplemail.main.from = username@gmail.com
vraptor.simplemail.main.username = username
vraptor.simplemail.main.password = password

MailController.java

import static br.com.caelum.vraptor.jasperreports.formats.ExportFormats.docx;
import static br.com.caelum.vraptor.jasperreports.formats.ExportFormats.pdf;
import static br.com.caelum.vraptor.jasperreports.formats.ExportFormats.xls;
import app.mailer.ReportEmail;
import app.mailer.ReportMailer;
import app.reports.ClientsReport;
import app.repositories.ClientRepository;
import br.com.caelum.vraptor.Get;
import br.com.caelum.vraptor.Resource;
import br.com.caelum.vraptor.Result;
import br.com.caelum.vraptor.jasperreports.Report;

@Resource
public class MailController {
	
	private final Result result;
	private final Clients clients;
	private final ReportMailer mailer;
	
	MailController(Result result, Clients clients, ReportMailer mailer) {
		this.result = result;
		this.clients = clients;
		this.mailer = mailer;
	}
	
	@Get("/send/report/{client.id}")
	public void send(@Load Client client){
		Report<?> report = new ClientsReport(clients.findAll());
		ReportEmail email = new ReportEmail();
		email.subject("Your subject")
		     .body("This message is automatically generated by ...")
		     .to(client.getEmail())
		     .attach(report, pdf())
		     .attach(report, xls())
		     .attach(report, docx());
		mailer.send(email);
		result.include("msg", "Sending email...");
	}
	

}

ReportEmail.java

package app.mailer;

import java.io.IOException;
import java.util.Collection;
import java.util.List;

import org.apache.commons.mail.ByteArrayDataSource;
import org.apache.commons.mail.EmailAttachment;
import org.apache.commons.mail.EmailException;
import org.apache.commons.mail.MultiPartEmail;

import br.com.caelum.vraptor.jasperreports.Report;
import br.com.caelum.vraptor.jasperreports.download.ReportEntry;
import br.com.caelum.vraptor.jasperreports.download.ReportZipFile;
import br.com.caelum.vraptor.jasperreports.exporter.ReportExporter;
import br.com.caelum.vraptor.jasperreports.formats.ExportFormat;

import com.google.common.collect.Lists;

public class ReportEmail extends MultiPartEmail {

	private final ReportZipFile zip = new ReportZipFile("attachment.zip");
	private final List<ReportEntry> entries = Lists.newArrayList();
	private boolean singleFile;
	
	public ReportEmail singleFile() {
		singleFile = true;
		return this;
	}

	public ReportEmail subject(String subject) {
		setSubject(subject);
		return this;
	}

	public ReportEmail body(String body) {
		try {
			setMsg(body);
		} catch (EmailException e) {
			throw new IllegalArgumentException(e);
		}
		return this;
	}

	public ReportEmail to(String... recipients) {
		try {
			for (String recipient : recipients)
				addTo(recipient);
		} catch (EmailException e) {
			throw new IllegalArgumentException(e);
		}
		return this;
	}
	
	public ReportEmail attach(Report<?> report, ExportFormat format){
		add(report, format);
		return this;
	}
	
	public ReportEmail attach(String filename, Collection<Report<?>> reports, ExportFormat format){
		add(filename, reports, format);
		return this;
	}
	
	private void add(Report<?> report, ExportFormat format){
		if(singleFile)
			zip.add(report, format);
		else
			entries.add(new ReportEntry(report, format));
	}
	
	private void add(String filename, Collection<Report<?>> reports, ExportFormat format){
		if(singleFile)
			zip.add(filename, reports, format);
		else
			entries.add(new ReportEntry(filename, reports, format));
	}
	
	
	public void attachReports(ReportExporter exporter) throws EmailException, IOException {
		if(singleFile)
			write(zip.getName(), zip.getContent(exporter), zip.getContentType());
		else {
			for(ReportEntry entry : entries)
				write(entry.getFilename(), entry.getContent(exporter), entry.getContentType());
		}
	}
	
	private void write(String name, byte[] content, String contentType) throws EmailException, IOException {
		attach(new ByteArrayDataSource(content, contentType), name, "", EmailAttachment.ATTACHMENT);
	}

}

ReportMailer.java

package app.mailer;

import java.io.IOException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import org.apache.commons.mail.EmailException;

import br.com.caelum.vraptor.ioc.Component;
import br.com.caelum.vraptor.jasperreports.exporter.ReportExporter;
import br.com.caelum.vraptor.simplemail.Mailer;

@Component
public class ReportMailer {

	private final Mailer delegate;
	private final ReportExporter exporter;
	
	public ReportMailer(Mailer delegate, ReportExporter exporter) {
		this.delegate = delegate;
		this.exporter = exporter;
	}
	
	public void send(final ReportEmail email){
		getExecutor().submit(new Runnable() {
			public void run() {
				try {
					email.attachReports(exporter);
					delegate.send(email);
				} catch (EmailException e) {
					throw new RuntimeException(e);
				} catch (IOException e) {
					throw new RuntimeException(e);
				}
			}
		});
	}
	
	protected ExecutorService getExecutor(){
		return Executors.newSingleThreadExecutor();
	}

}