tomsun28 commented on code in PR #3673: URL: https://github.com/apache/hertzbeat/pull/3673#discussion_r2285663691
########## web-app/src/app/routes/log/log-stream/log-stream.component.ts: ########## @@ -0,0 +1,402 @@ +/* + * 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. + */ + +import { CommonModule } from '@angular/common'; +import { Component, Inject, OnDestroy, OnInit, ViewChild, ElementRef, AfterViewInit } from '@angular/core'; +import { FormsModule } from '@angular/forms'; +import { I18NService } from '@core'; +import { ALAIN_I18N_TOKEN } from '@delon/theme'; +import { SharedModule } from '@shared'; +import { NzAlertModule } from 'ng-zorro-antd/alert'; +import { NzButtonModule } from 'ng-zorro-antd/button'; +import { NzCardModule } from 'ng-zorro-antd/card'; +import { NzDividerComponent } from 'ng-zorro-antd/divider'; +import { NzEmptyModule } from 'ng-zorro-antd/empty'; +import { NzInputModule } from 'ng-zorro-antd/input'; +import { NzModalModule } from 'ng-zorro-antd/modal'; +import { NzSelectModule } from 'ng-zorro-antd/select'; +import { NzSwitchModule } from 'ng-zorro-antd/switch'; +import { NzTagModule } from 'ng-zorro-antd/tag'; +import { NzToolTipModule } from 'ng-zorro-antd/tooltip'; + +import { LogEntry } from '../../../pojo/LogEntry'; + +interface ExtendedLogEntry { + original: LogEntry; + isNew?: boolean; + timestamp?: Date; +} + +@Component({ + selector: 'app-log-stream', + standalone: true, + imports: [ + CommonModule, + SharedModule, + FormsModule, + NzCardModule, + NzInputModule, + NzSelectModule, + NzButtonModule, + NzTagModule, + NzToolTipModule, + NzSwitchModule, + NzAlertModule, + NzEmptyModule, + NzModalModule, + NzDividerComponent + ], + templateUrl: './log-stream.component.html', + styleUrl: './log-stream.component.less' +}) +export class LogStreamComponent implements OnInit, OnDestroy, AfterViewInit { + // SSE connection and state + private eventSource!: EventSource; + isConnected: boolean = false; + isConnecting: boolean = false; + + // Log data + logEntries: ExtendedLogEntry[] = []; + maxLogEntries: number = 1000; + isPaused: boolean = false; + + // Filter properties + filterSeverityNumber: string = ''; + filterSeverityText: string = ''; + filterTraceId: string = ''; + filterSpanId: string = ''; + + // UI state + showFilters: boolean = true; + + // Modal state + isModalVisible: boolean = false; + selectedLogEntry: ExtendedLogEntry | null = null; + + // Auto scroll state + userScrolled: boolean = false; + private scrollTimeout: any; + private scrollDebounceTimeout: any; + private isNearBottom: boolean = true; + + // ViewChild for log container + @ViewChild('logContainer', { static: false }) logContainerRef!: ElementRef; + + constructor(@Inject(ALAIN_I18N_TOKEN) private i18nSvc: I18NService) {} + + ngOnInit(): void { + this.connectToLogStream(); + } + + ngAfterViewInit(): void { + this.setupScrollListener(); + } + + ngOnDestroy(): void { + this.disconnectFromLogStream(); + this.cleanupScrollListener(); + } + + onReconnect(): void { + this.logEntries = []; + this.connectToLogStream(); + } + + private connectToLogStream(): void { + if (this.eventSource) { + this.disconnectFromLogStream(); + } + + this.isConnecting = true; + + // Build filter parameters + const filterParams = this.buildFilterParams(); + const url = `/api/log/sse/subscribe${filterParams ? `?${filterParams}` : ''}`; + + try { + this.eventSource = new EventSource(url); + + this.eventSource.onopen = () => { + this.isConnected = true; + this.isConnecting = false; + }; + + this.eventSource.addEventListener('LOG_EVENT', (evt: MessageEvent) => { + if (!this.isPaused) { + try { + const logEntry: LogEntry = JSON.parse(evt.data); + this.addLogEntry(logEntry); + } catch (error) { + console.error('Error parsing log data:', error); + } + } + }); + + this.eventSource.onerror = error => { + console.error('Log stream connection error:', error); + this.isConnected = false; + this.isConnecting = false; + + // Auto-reconnect after 5 seconds + setTimeout(() => { + if (!this.isConnected) { + this.connectToLogStream(); + } + }, 5000); + }; + } catch (error) { + this.isConnecting = false; + console.error('Failed to create EventSource:', error); + } + } + + private disconnectFromLogStream(): void { + if (this.eventSource) { + this.eventSource.close(); + this.isConnected = false; + this.isConnecting = false; + } + } + + private buildFilterParams(): string { + const params = new URLSearchParams(); + + if (this.filterSeverityNumber && this.filterSeverityNumber.trim()) { + params.append('severityNumber', this.filterSeverityNumber); + } + + if (this.filterSeverityText && this.filterSeverityText.trim()) { + params.append('severityText', this.filterSeverityText); + } + + if (this.filterTraceId && this.filterTraceId.trim()) { + params.append('traceId', this.filterTraceId); + } + + if (this.filterSpanId && this.filterSpanId.trim()) { + params.append('spanId', this.filterSpanId); + } + + return params.toString(); + } + + private addLogEntry(logEntry: LogEntry): void { + const extendedEntry: ExtendedLogEntry = { + original: logEntry, + isNew: true, + timestamp: logEntry.timeUnixNano ? new Date(logEntry.timeUnixNano / 1000000) : new Date() + }; + + this.logEntries.unshift(extendedEntry); + + // Limit the number of log entries + if (this.logEntries.length > this.maxLogEntries) { + this.logEntries = this.logEntries.slice(0, this.maxLogEntries); + } + + // Remove new indicator after animation + setTimeout(() => { + const index = this.logEntries.findIndex(entry => entry === extendedEntry); + if (index !== -1) { + this.logEntries[index].isNew = false; + } + }, 1000); + + // Auto scroll to top if enabled and user hasn't scrolled away + if (!this.userScrolled) { + this.scheduleAutoScroll(); + } + } + + private setupScrollListener(): void { + if (this.logContainerRef?.nativeElement) { + const container = this.logContainerRef.nativeElement; + + container.addEventListener('scroll', () => { + // Debounce scroll events for better performance + if (this.scrollDebounceTimeout) { + clearTimeout(this.scrollDebounceTimeout); + } + + this.scrollDebounceTimeout = setTimeout(() => { + this.handleScroll(); + }, 100); + }); + } + } + + private cleanupScrollListener(): void { + if (this.scrollTimeout) { + clearTimeout(this.scrollTimeout); + } + if (this.scrollDebounceTimeout) { + clearTimeout(this.scrollDebounceTimeout); + } + } + + private handleScroll(): void { + if (!this.logContainerRef?.nativeElement) return; + + const container = this.logContainerRef.nativeElement; + const scrollTop = container.scrollTop; + + // Check if user is near the top (within 20px for more precise detection) + this.isNearBottom = scrollTop <= 20; + + // If user scrolls away from top, mark as user scrolled + if (!this.isNearBottom) { + this.userScrolled = true; + } else { + // If user scrolls back to top, reset the flag + this.userScrolled = false; + } + } + + private scheduleAutoScroll(): void { + // Clear existing timeout + if (this.scrollTimeout) { + clearTimeout(this.scrollTimeout); + } + + // Schedule scroll with longer delay to ensure DOM update + this.scrollTimeout = setTimeout(() => { + this.performAutoScroll(); + }, 100); + } + + private performAutoScroll(): void { + if (!this.logContainerRef?.nativeElement || this.userScrolled) { + return; + } + + const container = this.logContainerRef.nativeElement; + + // Use smooth scroll for better UX + container.scrollTo({ + top: 0, + behavior: 'smooth' + }); + } + + // Event handlers + onApplyFilters(): void { + this.logEntries = []; // Clear existing logs + this.connectToLogStream(); // Reconnect with new filters + } + + onFilterChange(): void { + this.logEntries = []; // Clear existing logs + this.connectToLogStream(); // Reconnect with new filters + } + + onClearFilters(): void { + this.filterSeverityNumber = ''; + this.filterSeverityText = ''; + this.filterTraceId = ''; + this.filterSpanId = ''; + this.logEntries = []; + this.connectToLogStream(); + } + + onTogglePause(): void { + this.isPaused = !this.isPaused; + } + + onClearLogs(): void { + this.logEntries = []; + this.userScrolled = false; + this.isNearBottom = true; + } + + onToggleFilters(): void { + this.showFilters = !this.showFilters; + } + + // Add method to manually scroll to top + scrollToTop(): void { + this.userScrolled = false; + this.isNearBottom = true; + this.scheduleAutoScroll(); + } + + // Utility methods + getSeverityColor(severityNumber: number | undefined): string { + console.log('severityNumber', severityNumber); Review Comment: +1 the console.log need be removed. -- This is an automated message from the Apache Git Service. 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