Slack Plugin Example (#8542)
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.baeldung.examples</groupId>
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<artifactId>slack</artifactId>
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<version>1.0</version>
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<name>slack</name>
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<packaging>jar</packaging>
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<parent>
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<groupId>com.baeldung</groupId>
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<artifactId>parent-modules</artifactId>
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<version>1.0.0-SNAPSHOT</version>
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</parent>
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<dependencies>
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<dependency>
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<groupId>com.hubspot.slack</groupId>
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<artifactId>slack-base</artifactId>
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<version>${slack.version}</version>
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</dependency>
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<dependency>
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<groupId>com.hubspot.slack</groupId>
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<artifactId>slack-java-client</artifactId>
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<version>${slack.version}</version>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-jar-plugin</artifactId>
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<version>${maven-jar-plugin.version}</version>
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<configuration>
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<archive>
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<manifest>
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<addClasspath>true</addClasspath>
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<mainClass>com.baeldung.examples.slack.MainClass</mainClass>
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</manifest>
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</archive>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.codehaus.mojo</groupId>
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<artifactId>exec-maven-plugin</artifactId>
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<version>1.6.0</version>
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<configuration>
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<mainClass>com.baeldung.examples.slack.MainClass</mainClass>
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</configuration>
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</plugin>
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</plugins>
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</build>
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<properties>
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<slack.version>1.4</slack.version>
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<maven-jar-plugin.version>2.4</maven-jar-plugin.version>
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</properties>
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</project>
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package com.baeldung.examples.slack;
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import java.io.IOException;
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import java.nio.file.FileSystems;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public class DiskSpaceErrorChecker implements ErrorChecker {
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private static final Logger LOG = LoggerFactory.getLogger(DiskSpaceErrorChecker.class);
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private final ErrorReporter errorReporter;
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private final double limit;
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public DiskSpaceErrorChecker(ErrorReporter errorReporter, double limit) {
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this.errorReporter = errorReporter;
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this.limit = limit;
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}
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@Override
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public void check() {
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LOG.info("Checking disk space");
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FileSystems.getDefault().getFileStores().forEach(fileStore -> {
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try {
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long totalSpace = fileStore.getTotalSpace();
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long usableSpace = fileStore.getUsableSpace();
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double usablePercentage = ((double) usableSpace) / totalSpace;
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LOG.debug("File store {} has {} of {} ({}) usable space",
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fileStore, usableSpace, totalSpace, usablePercentage);
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if (totalSpace > 0 && usablePercentage < limit) {
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String error = String.format("File store %s only has %d%% usable disk space",
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fileStore.name(), (int)(usablePercentage * 100));
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errorReporter.reportProblem(error);
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}
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} catch (IOException e) {
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LOG.error("Error getting disk space for file store {}", fileStore, e);
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}
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});
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}
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}
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package com.baeldung.examples.slack;
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public interface ErrorChecker {
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void check();
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}
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package com.baeldung.examples.slack;
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public interface ErrorReporter {
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void reportProblem(String problem);
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}
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package com.baeldung.examples.slack;
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import java.io.IOException;
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import java.util.Timer;
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import java.util.TimerTask;
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import com.hubspot.slack.client.SlackClient;
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import com.hubspot.slack.client.SlackClientFactory;
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import com.hubspot.slack.client.SlackClientRuntimeConfig;
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public class MainClass {
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public static final long MINUTES = 1000 * 60;
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public static void main(String[] args) throws IOException {
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SlackClientRuntimeConfig runtimeConfig = SlackClientRuntimeConfig.builder()
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.setTokenSupplier(() -> "<Your API Token>")
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.build();
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SlackClient slackClient = SlackClientFactory.defaultFactory().build(runtimeConfig);
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ErrorReporter slackChannelErrorReporter = new SlackChannelErrorReporter(slackClient, "general");
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ErrorReporter slackUserErrorReporter = new SlackUserErrorReporter(slackClient, "testuser@baeldung.com");
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ErrorChecker diskSpaceErrorChecker10pct = new DiskSpaceErrorChecker(slackChannelErrorReporter, 0.1);
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ErrorChecker diskSpaceErrorChecker2pct = new DiskSpaceErrorChecker(slackUserErrorReporter, 0.02);
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Timer timer = new Timer();
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timer.scheduleAtFixedRate(new TimerTask() {
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@Override
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public void run() {
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diskSpaceErrorChecker10pct.check();
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}
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}, 0, 5 * MINUTES);
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timer.scheduleAtFixedRate(new TimerTask() {
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@Override
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public void run() {
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diskSpaceErrorChecker2pct.check();
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}
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}, 0, 5 * MINUTES);
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}
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}
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package com.baeldung.examples.slack;
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import com.hubspot.slack.client.SlackClient;
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import com.hubspot.slack.client.methods.params.chat.ChatPostMessageParams;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public class SlackChannelErrorReporter implements ErrorReporter {
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private static final Logger LOG = LoggerFactory.getLogger(SlackChannelErrorReporter.class);
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private final SlackClient slackClient;
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private final String channel;
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public SlackChannelErrorReporter(SlackClient slackClient, String channel) {
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this.slackClient = slackClient;
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this.channel = channel;
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}
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@Override
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public void reportProblem(String problem) {
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LOG.debug("Sending message to channel {}: {}", channel, problem);
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slackClient.postMessage(
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ChatPostMessageParams.builder()
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.setText(problem)
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.setChannelId(channel)
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.build()
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).join().unwrapOrElseThrow();
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}
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}
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package com.baeldung.examples.slack;
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import java.util.List;
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import com.hubspot.slack.client.SlackClient;
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import com.hubspot.slack.client.methods.params.chat.ChatPostMessageParams;
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import com.hubspot.slack.client.methods.params.conversations.ConversationCreateParams;
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import com.hubspot.slack.client.methods.params.im.ImOpenParams;
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import com.hubspot.slack.client.methods.params.users.UserEmailParams;
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import com.hubspot.slack.client.methods.params.users.UsersInfoParams;
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import com.hubspot.slack.client.models.response.im.ImOpenResponse;
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import com.hubspot.slack.client.models.response.users.UsersInfoResponse;
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import com.hubspot.slack.client.models.users.SlackUser;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public class SlackUserErrorReporter implements ErrorReporter {
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private static final Logger LOG = LoggerFactory.getLogger(SlackUserErrorReporter.class);
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private final SlackClient slackClient;
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private final String user;
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public SlackUserErrorReporter(SlackClient slackClient, String user) {
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this.slackClient = slackClient;
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this.user = user;
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}
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@Override
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public void reportProblem(String problem) {
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LOG.debug("Sending message to user {}: {}", user, problem);
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UsersInfoResponse usersInfoResponse = slackClient
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.lookupUserByEmail(UserEmailParams.builder()
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.setEmail(user)
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.build()
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).join().unwrapOrElseThrow();
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ImOpenResponse imOpenResponse = slackClient.openIm(ImOpenParams.builder()
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.setUserId(usersInfoResponse.getUser().getId())
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.build()
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).join().unwrapOrElseThrow();
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imOpenResponse.getChannel().ifPresent(channel -> {
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slackClient.postMessage(
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ChatPostMessageParams.builder()
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.setText(problem)
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.setChannelId(channel.getId())
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.build()
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).join().unwrapOrElseThrow();
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});
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}
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}
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<?xml version="1.0" encoding="UTF-8"?>
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<configuration>
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<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
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<encoder>
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<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
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</pattern>
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</encoder>
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</appender>
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<root level="DEBUG">
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<appender-ref ref="STDOUT" />
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</root>
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</configuration>
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