Adapt to syncing to the cloud instance

src/main/java/org/hibernate/infra/replicate/jira/JiraConfig.java

@@ -290,6 +290,13 @@ interface IssueLinkTypeValueMapping extends ValueMapping {
 		 *         {@code "globalId": "appId=5e7d6222-8225-3bcd-be58-5fe3980b0fae&issueId=65806"}
 		 */
 		Optional<String> applicationIdForRemoteLinkType();
+
+		/**
+		 * @return the appId to be used to create a globalId for a remote link, e.g.:
+		 *         Jira Cloud has the format:
+		 *         {@code "globalId": "system=http://www.mycompany.com/support&id=1"}
+		 */
+		Optional<String> systemForRemoteLinkType();
 	}
 
 	interface IssueTypeValueMapping extends ValueMapping {

src/main/java/org/hibernate/infra/replicate/jira/service/jira/HandlerProjectContext.java

@@ -72,7 +72,7 @@ public AtomicLong currentIssueKeyNumber() {
 	public Long getLargestSyncedJiraIssueKeyNumber() {
 		JiraIssues issues = projectGroupContext.destinationJiraClient()
 				.find("project = %s and summary !~\"%s\" ORDER BY key DESC".formatted(project.projectId(),
-						SYNC_ISSUE_PLACEHOLDER_SUMMARY), 0, 1);
+						SYNC_ISSUE_PLACEHOLDER_SUMMARY), null, 1, List.of("key"));
 		if (issues.issues.isEmpty()) {
 			return 0L;
 		} else {
@@ -100,7 +100,7 @@ public Optional<JiraIssue> getNextIssueToSync(Long latestSyncedJiraIssueKeyNumbe
 	private Long getCurrentLatestJiraIssueKeyNumber() {
 		try {
 			JiraIssues issues = projectGroupContext.destinationJiraClient()
-					.find("project = %s ORDER BY created DESC".formatted(project.projectId()), 0, 1);
+					.find("project = %s ORDER BY created DESC".formatted(project.projectId()), null, 1, List.of("key"));
 			if (issues.issues.isEmpty()) {
 				return 0L;
 			} else {

src/main/java/org/hibernate/infra/replicate/jira/service/jira/handler/JiraEventHandler.java

@@ -21,7 +21,7 @@
 import jakarta.ws.rs.core.UriBuilder;
 
 public abstract class JiraEventHandler implements Runnable {
-	protected static final int MAX_CONTENT_SIZE = 65_535;
+	protected static final int MAX_CONTENT_SIZE = 32_766;
 
 	protected final Long objectId;
 	protected final FailureCollector failureCollector;

src/main/java/org/hibernate/infra/replicate/jira/service/jira/handler/JiraIssueAbstractEventHandler.java

@@ -94,17 +94,15 @@ protected JiraRemoteLink remoteSelfLink(JiraIssue sourceIssue) {
 		// And if the appid/names are available then we can make it also look as if it
 		// is not a remote link:
 
-		Optional<String> appId = context.projectGroup().issueLinkTypes().applicationIdForRemoteLinkType();
-		link.globalId = appId.map(s -> "appId=%s&issueId=%s".formatted(s, sourceIssue.id))
-				.orElseGet(jiraLink::toString);
+		Optional<String> formattedId = JiraRemoteLink.createGlobalId(context.projectGroup().issueLinkTypes(),
+				sourceIssue.key);
+		link.globalId = formattedId.orElseGet(jiraLink::toString);
 
 		link.relationship = "Upstream issue";
 		link.object.title = sourceIssue.key;
 		link.object.url = jiraLink;
 		link.object.summary = "Link to an upstream JIRA issue, from which this one was cloned.";
 
-		Optional<String> applicationName = context.projectGroup().issueLinkTypes().applicationNameForRemoteLinkType();
-		link.application = applicationName.map(JiraRemoteLink.Application::new).orElse(null);
 		return link;
 	}
 

src/main/java/org/hibernate/infra/replicate/jira/service/jira/handler/JiraIssueLinkUpsertEventHandler.java

@@ -86,13 +86,13 @@ private void createAsRemoteLink(JiraIssueLink sourceLink, String linkedIssueKey,
 		Optional<String> appId = context.projectGroup().issueLinkTypes().applicationIdForRemoteLinkType();
 		link.globalId = appId.map(s -> "appId=%s&issueId=%s".formatted(s, linkedIssueId))
 				.orElseGet(() -> sourceLink.self.toString());
+		Optional<String> formattedId = JiraRemoteLink.createGlobalId(context.projectGroup().issueLinkTypes(),
+				linkedIssueKey);
+		link.globalId = formattedId.orElseGet(jiraLink::toString);
+
 		link.relationship = sourceLink.type.name;
 		link.object.title = linkedIssueKey;
 		link.object.url = jiraLink;
-
-		Optional<String> applicationName = context.projectGroup().issueLinkTypes().applicationNameForRemoteLinkType();
-		link.application = applicationName.map(JiraRemoteLink.Application::new).orElse(null);
-		context.destinationJiraClient().upsertRemoteLink(currentIssue, link);
 	}
 
 	@Override

src/main/java/org/hibernate/infra/replicate/jira/service/jira/model/rest/JiraRemoteLink.java

@@ -1,7 +1,9 @@
 package org.hibernate.infra.replicate.jira.service.jira.model.rest;
 
 import java.net.URI;
+import java.util.Optional;
 
+import org.hibernate.infra.replicate.jira.JiraConfig;
 import org.hibernate.infra.replicate.jira.service.jira.model.JiraBaseObject;
 
 public class JiraRemoteLink extends JiraBaseObject {
@@ -11,6 +13,19 @@ public class JiraRemoteLink extends JiraBaseObject {
 	public LinkObject object = new LinkObject();
 	public Application application;
 
+	public static Optional<String> createGlobalId(JiraConfig.IssueLinkTypeValueMapping issueLinkTypeValueMapping,
+			String sourceIssue) {
+		Optional<String> appId = issueLinkTypeValueMapping.applicationIdForRemoteLinkType();
+		if (appId.isPresent()) {
+			return appId.map(s -> "appId=%s&issueId=%s".formatted(s, sourceIssue));
+		}
+		Optional<String> system = issueLinkTypeValueMapping.systemForRemoteLinkType();
+		if (system.isPresent()) {
+			return system.map(s -> "system=%s&id=%s".formatted(s, sourceIssue));
+		}
+		return Optional.empty();
+	}
+
 	@Override
 	public String toString() {
 		return "JiraRemoteLink{" + "globalId='" + globalId + '\'' + ", self=" + self + ", relationship='" + relationship