Lehel44 commented on a change in pull request #5471: URL: https://github.com/apache/nifi/pull/5471#discussion_r738854734
########## File path: nifi-nar-bundles/nifi-standard-services/nifi-record-sink-service-bundle/nifi-record-sink-service/src/main/java/org/apache/nifi/record/sink/EmailRecordSink.java ########## @@ -0,0 +1,381 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.record.sink; + +import jakarta.mail.Authenticator; +import jakarta.mail.Message; +import jakarta.mail.MessagingException; +import jakarta.mail.PasswordAuthentication; +import jakarta.mail.Session; +import jakarta.mail.Transport; +import jakarta.mail.internet.AddressException; +import jakarta.mail.internet.InternetAddress; +import jakarta.mail.internet.MimeMessage; +import org.apache.nifi.annotation.lifecycle.OnEnabled; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.components.ValidationContext; +import org.apache.nifi.components.ValidationResult; +import org.apache.nifi.controller.AbstractControllerService; +import org.apache.nifi.controller.ConfigurationContext; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.util.StandardValidators; +import org.apache.nifi.schema.access.SchemaNotFoundException; +import org.apache.nifi.serialization.RecordSetWriter; +import org.apache.nifi.serialization.RecordSetWriterFactory; +import org.apache.nifi.serialization.WriteResult; +import org.apache.nifi.serialization.record.Record; +import org.apache.nifi.serialization.record.RecordSet; + +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collection; +import java.util.Collections; +import java.util.Date; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Properties; + +public class EmailRecordSink extends AbstractControllerService implements RecordSinkService { + + public static final PropertyDescriptor FROM = new PropertyDescriptor.Builder() + .name("from") + .displayName("From") + .description("Specifies the Email address to use as the sender. " + + "Comma separated sequence of addresses following RFC822 syntax.") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + public static final PropertyDescriptor TO = new PropertyDescriptor.Builder() + .name("to") + .displayName("To") + .description("The recipients to include in the To-Line of the email. " + + "Comma separated sequence of addresses following RFC822 syntax.") + .required(false) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + public static final PropertyDescriptor CC = new PropertyDescriptor.Builder() + .name("cc") + .displayName("CC") + .description("The recipients to include in the CC-Line of the email. " + + "Comma separated sequence of addresses following RFC822 syntax.") + .required(false) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + public static final PropertyDescriptor BCC = new PropertyDescriptor.Builder() + .name("bcc") + .displayName("BCC") + .description("The recipients to include in the BCC-Line of the email. " + + "Comma separated sequence of addresses following RFC822 syntax.") + .required(false) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + public static final PropertyDescriptor SUBJECT = new PropertyDescriptor.Builder() + .name("subject") + .displayName("Subject") + .description("The email subject") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .defaultValue("Message from NiFi") + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + public static final PropertyDescriptor SMTP_HOSTNAME = new PropertyDescriptor.Builder() + .name("smtp-hostname") + .displayName("SMTP Hostname") + .description("The hostname of the SMTP Server that is used to send Email Notifications") + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .required(true) + .build(); + public static final PropertyDescriptor SMTP_PORT = new PropertyDescriptor.Builder() + .name("smtp-port") + .displayName("SMTP Port") + .description("The Port used for SMTP communications") + .required(true) + .defaultValue("25") + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.PORT_VALIDATOR) + .build(); + public static final PropertyDescriptor SMTP_AUTH = new PropertyDescriptor.Builder() + .name("smtp-auth") + .displayName("SMTP Auth") + .description("Flag indicating whether authentication should be used") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.BOOLEAN_VALIDATOR) + .defaultValue("true") + .build(); + public static final PropertyDescriptor SMTP_USERNAME = new PropertyDescriptor.Builder() + .name("smtp-username") + .displayName("SMTP Username") + .description("Username for the SMTP account") + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .required(false) + .dependsOn(SMTP_AUTH, "true") + .build(); + public static final PropertyDescriptor SMTP_PASSWORD = new PropertyDescriptor.Builder() + .name("smtp-password") + .displayName("SMTP Password") + .description("Password for the SMTP account") + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .required(false) + .sensitive(true) + .dependsOn(SMTP_AUTH, "true") + .build(); + public static final PropertyDescriptor SMTP_STARTTLS = new PropertyDescriptor.Builder() + .name("smtp-starttls") + .displayName("SMTP STARTTLS") + .description("Flag indicating whether TLS should be enabled") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.BOOLEAN_VALIDATOR) + .defaultValue("false") + .build(); + public static final PropertyDescriptor SMTP_SSL = new PropertyDescriptor.Builder() + .name("smtp-ssl") + .displayName("SMTP SSL") + .description("Flag indicating whether SSL should be enabled") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .defaultValue("false") + .build(); + public static final PropertyDescriptor HEADER_XMAILER = new PropertyDescriptor.Builder() + .name("smtp-xmailer-header") + .displayName("SMTP X-Mailer Header") + .description("X-Mailer used in the header of the outgoing email") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .defaultValue("NiFi") + .build(); + public static final PropertyDescriptor CONTENT_TYPE = new PropertyDescriptor.Builder() + .name("content-type") + .displayName("Content Type") + .description("Mime Type used to interpret the contents of the email, such as text/plain or text/html") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .defaultValue("text/plain") + .build(); + + + private volatile RecordSetWriterFactory writerFactory; + + /** + * Mapping of the mail properties to the NiFi PropertyDescriptors that will be evaluated at runtime + */ + private static final Map<String, PropertyDescriptor> propertyToContext = new HashMap<>(); + + static { + propertyToContext.put("mail.smtp.host", SMTP_HOSTNAME); + propertyToContext.put("mail.smtp.port", SMTP_PORT); + propertyToContext.put("mail.smtp.socketFactory.port", SMTP_PORT); + propertyToContext.put("mail.smtp.ssl.enable", SMTP_SSL); + propertyToContext.put("mail.smtp.auth", SMTP_AUTH); + propertyToContext.put("mail.smtp.starttls.enable", SMTP_STARTTLS); + propertyToContext.put("mail.smtp.user", SMTP_USERNAME); + propertyToContext.put("mail.smtp.password", SMTP_PASSWORD); + } + + @Override + protected List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return Collections.unmodifiableList(Arrays.asList( + TO, + FROM, + CC, + BCC, + SUBJECT, + SMTP_HOSTNAME, + SMTP_PORT, + SMTP_USERNAME, + SMTP_PASSWORD, + SMTP_AUTH, + SMTP_STARTTLS, + SMTP_SSL, + HEADER_XMAILER, + CONTENT_TYPE, + RecordSinkService.RECORD_WRITER_FACTORY + )); + } + + @Override + protected Collection<ValidationResult> customValidate(final ValidationContext context) { + final List<ValidationResult> errors = new ArrayList<>(super.customValidate(context)); + + final String to = context.getProperty(TO).getValue(); + final String cc = context.getProperty(CC).getValue(); + final String bcc = context.getProperty(BCC).getValue(); + + if (to == null && cc == null && bcc == null) { + errors.add(new ValidationResult.Builder().subject("To, CC, BCC").valid(false).explanation("Must specify at least one To/CC/BCC address").build()); + } + + return errors; + } + + @OnEnabled + public void onEnabled(final ConfigurationContext context) { + writerFactory = context.getProperty(RECORD_WRITER_FACTORY).asControllerService(RecordSetWriterFactory.class); + } + + private void sendMessage(final ConfigurationContext context, final String messageText) { + final Properties properties = getMailProperties(context); + final Session mailSession = createMailSession(properties); + final Message message = new MimeMessage(mailSession); + + try { + message.setFrom(InternetAddress.parse(context.getProperty(FROM).evaluateAttributeExpressions().getValue())[0]); + + final InternetAddress[] toAddresses = toInetAddresses(context, TO); + message.setRecipients(Message.RecipientType.TO, toAddresses); + + final InternetAddress[] ccAddresses = toInetAddresses(context, CC); + message.setRecipients(Message.RecipientType.CC, ccAddresses); + + final InternetAddress[] bccAddresses = toInetAddresses(context, BCC); + message.setRecipients(Message.RecipientType.BCC, bccAddresses); + + message.setHeader("X-Mailer", context.getProperty(HEADER_XMAILER).evaluateAttributeExpressions().getValue()); + message.setSubject(context.getProperty(SUBJECT).evaluateAttributeExpressions().getValue()); + + final String contentType = context.getProperty(CONTENT_TYPE).evaluateAttributeExpressions().getValue(); + message.setContent(messageText, contentType); + message.setSentDate(new Date()); + + send(message); + } catch (final ProcessException | MessagingException e) { + throw new RuntimeException("Failed to send E-mail Notification", e); + } + } + + @Override + public WriteResult sendData(final RecordSet recordSet, final Map<String, String> attributes, final boolean sendZeroResults) throws IOException { + WriteResult writeResult; + try (final ByteArrayOutputStream out = new ByteArrayOutputStream()) { + try (final RecordSetWriter writer = writerFactory.createWriter(getLogger(), recordSet.getSchema(), out, attributes)) { + writer.beginRecordSet(); + Record r; + while ((r = recordSet.next()) != null) { + writer.write(r); + writer.flush(); + } + writeResult = writer.finishRecordSet(); + writer.flush(); + sendMessage(getConfigurationContext(), out.toString()); + } + } catch (SchemaNotFoundException e) { + throw new IOException(e); Review comment: Yes, I agree. -- This is an automated message from the Apache Git Service. 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