Java tutorial
/* * Copyright (c) 1997-2013 Oracle and/or its affiliates. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * - Neither the name of Oracle nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ import java.util.*; import javax.mail.*; import javax.mail.internet.*; /** * This class demonstrates how to query the registry for available * Providers, set default providers, etc. See section 5.2 in the * JavaMail Spec for details on how to use the registry. * * See the comments inline for what's happening. * * @author Max Spivak */ public class registry { // let's remember a few providers static Provider _aProvider, _bProvider, _sunSMTP, _sunIMAP; public static void main(String[] args) { Properties props = new Properties(); // set smtp and imap to be our default // transport and store protocols, respectively props.put("mail.transport.protocol", "smtp"); props.put("mail.store.protocol", "imap"); // props.put("mail.smtp.class", "com.sun.mail.smtp.SMTPTransport"); props.put("mail.imap.class", "com.sun.mail.imap.IMAPStore"); Session session = Session.getInstance(props, null); //session.setDebug(true); // Retrieve all configured providers from the Session System.out.println("\n------ getProviders()----------"); Provider[] providers = session.getProviders(); for (int i = 0; i < providers.length; i++) { System.out.println("** " + providers[i]); // let's remember some providers so that we can use them later // (I'm explicitly showing multiple ways of testing Providers) // BTW, no Provider "ACME Corp" will be found in the default // setup b/c its not in any javamail.providers resource files String s = null; if (((s = providers[i].getVendor()) != null) && s.startsWith("ACME Corp")) { _aProvider = providers[i]; } // this Provider won't be found by default either if (providers[i].getClassName().endsWith("application.smtp")) _bProvider = providers[i]; // this Provider will be found since com.sun.mail.imap.IMAPStore // is configured in javamail.default.providers if (providers[i].getClassName().equals("com.sun.mail.imap.IMAPStore")) { _sunIMAP = providers[i]; } // this Provider will be found as well since there is an // Oracle SMTP transport configured by // default in javamail.default.providers if (((s = providers[i].getVendor()) != null) && s.startsWith("Oracle") && providers[i].getType() == Provider.Type.TRANSPORT && providers[i].getProtocol().equalsIgnoreCase("smtp")) { _sunSMTP = providers[i]; } } System.out.println("\n------ initial protocol defaults -------"); try { System.out.println("imap: " + session.getProvider("imap")); System.out.println("smtp: " + session.getProvider("smtp")); // the NNTP provider will fail since we don't have one configured System.out.println("nntp: " + session.getProvider("nntp")); } catch (NoSuchProviderException mex) { System.out.println(">> This exception is OK since there is no NNTP Provider configured by default"); mex.printStackTrace(); } System.out.println("\n------ set new protocol defaults ------"); // set some new defaults try { // since _aProvider isn't configured, this will fail session.setProvider(_aProvider); // will fail } catch (NoSuchProviderException mex) { System.out.println(">> Exception expected: _aProvider is null"); mex.printStackTrace(); } try { // _sunIMAP provider should've configured correctly; should work session.setProvider(_sunIMAP); } catch (NoSuchProviderException mex) { mex.printStackTrace(); } try { System.out.println("imap: " + session.getProvider("imap")); System.out.println("smtp: " + session.getProvider("smtp")); } catch (NoSuchProviderException mex) { mex.printStackTrace(); } System.out.println("\n\n----- get some stores ---------"); // multiple ways to retrieve stores. these will print out the // string "imap:" since its the URLName for the store try { System.out.println("getStore(): " + session.getStore()); System.out.println("getStore(Provider): " + session.getStore(_sunIMAP)); } catch (NoSuchProviderException mex) { mex.printStackTrace(); } try { System.out.println("getStore(imap): " + session.getStore("imap")); // pop3 will fail since it doesn't exist System.out.println("getStore(pop3): " + session.getStore("pop3")); } catch (NoSuchProviderException mex) { System.out.println(">> Exception expected: no pop3 provider"); mex.printStackTrace(); } System.out.println("\n\n----- now for transports/addresses ---------"); // retrieve transports; these will print out "smtp:" (like stores did) try { System.out.println("getTransport(): " + session.getTransport()); System.out.println("getTransport(Provider): " + session.getTransport(_sunSMTP)); System.out.println("getTransport(smtp): " + session.getTransport("smtp")); System.out.println( "getTransport(Address): " + session.getTransport(new InternetAddress("mspivak@apilon"))); // News will fail since there's no news provider configured System.out.println("getTransport(News): " + session.getTransport(new NewsAddress("rec.humor"))); } catch (MessagingException mex) { System.out.println(">> Exception expected: no news provider configured"); mex.printStackTrace(); } } }