第二章 日志和報告
Adobe Flex Complier API為您生成報告(Reports) 并提供在編譯過程中的進度和日志等資訊。
使用自定義日志
您可以使用編譯器擷取錯誤資訊。您可以自定義一個logger并為這個application指派logger,告訴這個application您正在編譯。
使用自定義日志的具體步驟如下:
1、建立一個JAVA類,實作flex2.tools.oem.Logger接口;例如:
// java/SimpleLogger.java
import flex2.tools.oem.Message;
import flex2.tools.oem.Logger;
import java.util.*;
public class SimpleLogger implements Logger {
SimpleLogger() {
System.out.println("----------------------------------");
}
public void log(Message msg, int errorCode, String source) {
System.out.println(msg);
System.out.println("----------------------------------");
}
}
這個類必須實作log方法,它有3個參數:message,errorCode和source。
2、在您的JAVA應用裡,調用接口的setLogger()方法為這個Applocation指派logger;例如:
application.setLogger(new SimpleLogger());
如果您沒有調用setLogger()方法,則編譯器記錄log資訊到标準輸出。
3、編譯并運作例子
4、測試這個logger,在您的例子中加入一些錯誤的文法;例如:
<?xml version="1.0"?>
<!-- apps/ErrorTestApp.mxml -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script>
// Generates a warning because there is no return type.
public function doSomethingWrong() {
// Generates an error because x lacks a type.
var x;
}
</mx:Script>
<mx:Label text="Hello World"/>
</mx:Application>
例子可能輸入如下資訊:
---------------------------------- ERROR: Loading configuration file C:\home\dev\depot\flex\sdk\frameworks\flex-config.xml -------------------------------------------------------------------- ERROR: return value for function 'doSomethingWrong' has no type declaration. ---------------------------------- ERROR: variable 'x' has no type declaration. ----------------------------------
使用消息類中的getLevel()、getPath(),getLine()和getColumn(),您可以獲得其他資訊,比如錯誤級别(error level)和錯誤地點(location of error),下面的例子比上面的例子輸出了更多的資訊:
// java/ComplexLogger.java
import flex2.tools.oem.Message;
import flex2.tools.oem.Logger;
import java.util.*;
import java.io.*;
public class ComplexLogger implements Logger {
ComplexLogger() {
String LOGFILENAME = "output.txt";
try {
System.setOut(new PrintStream(new
FileOutputStream(LOGFILENAME)));
} catch (Exception e) {
System.out.println("There was an error creating
the log file.");
}
System.out.println("Ran at : " + new Date());
System.out.println("----------------------------------");
}
public void log(Message msg, int errorCode, String source) {
if (msg.getLevel() == "info") {
// Suppress info messages.
} else {
System.out.println("ERROR : " + errorCode);
System.out.println("MESSAGE: " + msg);
System.out.println("SOURCE : " + source);
System.out.println("LEVEL : " + msg.getLevel());
System.out.println("PATH : " + msg.getPath());
System.out.println("LINE : " + msg.getLine());
System.out.println("COLUMN : " + msg.getColumn());
System.out.println("----------------------------------");
}
}
}
不是所有的編譯錯誤都有明确的解釋。例如,在您的MXML代碼中發生錯誤,就沒有錯誤碼,是以Logger傳回 -1 。 而AS代碼,無論何時,都會傳回錯誤代碼。
您也可以使用Report Class在編譯正在執行的時候檢視Message對象。
建立報告
Flex compiler API包括了對application、library或正在編譯的項目建立報告的能力。在報告中,您可以包含應用的詳細資訊,資訊包括連結、資源、依賴、庫和資源綁定(resource bundle)等,也包括背景顔色,高度,寬度等應用程式的增量資訊。
您可以用Application和Library對象的getReport()方法來獲得報告。這個方法傳回一個Report類執行個體,使用它就可以輸出關于編譯目标的資訊。
在您使用Report類生成報告之前,您必須建構應用程式或庫,這意味着您必須在調用任何報告t方法之前調用build()方法。
下面的例子将輸出報告資訊到标準輸出:
// java/MyReportCompiler.java
import flex2.tools.oem.Application;
import flex2.tools.oem.Report;
import flex2.tools.oem.Configuration;
import flex2.tools.oem.Logger;
import java.io.*;
public class MyReportCompiler {
public static void main(String[] args) {
String assetRoot = "../assets/";
String outputRoot = "../apps/";
File[] themeFile = new File[]
{new File(assetRoot, "myTheme.css")};
File[] libFile = new File[]
{new File(assetRoot, "MyComponents.swc")};
try {
Application application = new
Application(new File(outputRoot,
"TestAppWithAllAssets.mxml"));
application.setOutput(new File(outputRoot,
"TestAppWithAllAssets.swf"));
application.setLogger(new ComplexLogger());
application.setProgressMeter(new MyProgressMeter());
Configuration config = application.getDefaultConfiguration();
config.setTheme(themeFile);
config.addLibraryPath(libFile);
application.setConfiguration(config);
application.build(true);
Report report = application.getReport();
// Lists the image files that are embedded.
System.out.println("\n\nEMBEDDED ASSETS: ");
String[] cnames = report.getAssetNames(Report.COMPILER);
for (int i=0; i<cnames.length; i++) {
System.out.println(cnames[i]);
}
// Lists the libraries that are used.
System.out.println("\nLIBRARIES: ");
String[] libs = report.getLibraryNames(Report.COMPILER);
for (int i=0; i<libs.length; i++) {
System.out.println(libs[i]);
}
// Lists source files, their definition names, and dependencies.
System.out.println("\nSOURCE NAMES: ");
String[] list = report.getSourceNames(Report.COMPILER);
for (int i=0; i<list.length; i++) {
System.out.println(list[i]);
String[] defs = report.getDefinitionNames(list[i]);
System.out.println("DEFINITIONS: ");
for (int j=0; j<defs.length; j++) {
System.out.println(defs[j]);
System.out.println(" DEPENDENCIES: ");
String[] deps = report.getDependencies(defs[j]);
for (int k=0; k<deps.length; k++) {
System.out.println(" " + deps[k]);
}
System.out.println(" PREREQS: ");
String[] prereqs = report.getPrerequisites(defs[j]);
for (int k=0; k<prereqs.length; k++) {
System.out.println(" " + prereqs[k]);
}
}
}
// Get application info.
System.out.println("\nAPPLICATION INFO: ");
System.out.println(" Background Color: " +
"0x" + Integer.toHexString(report.getBackgroundColor()).
toUpperCase());
System.out.println(" Height : " +
report.getDefaultHeight() +
" (" +
Math.round(100 * report.getHeightPercent()) +
"%)");
System.out.println(" Width : " +
report.getDefaultWidth() +
" (" +
Math.round(100 * report.getWidthPercent()) +
"%)");
System.out.println(" Page Title : " +
report.getPageTitle());
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
輸出資訊大體如下:
EMBEDDED ASSETS: C:\home\depot\EN\Docs\Flex\Flex2next\oem_kit\code\assets\bird-gray.gifC:\home\depot\EN\Docs\Flex\Flex2next\oem_kit\code\assets\bird-silly.gif C:\home\depot\EN\Docs\Flex\Flex2next\oem_kit\code\assets\bird.gif LIBRARIES: C:\home\depot\EN\Docs\Flex\Flex2next\oem_kit\code\assets\MyComponents.swc C:\home\dev\depot\flex\sdk\bundles\en_US\charts_rb.swc C:\home\dev\depot\flex\sdk\bundles\en_US\framework_rb.swc C:\home\dev\depot\flex\sdk\frameworks\libs\flex.swc C:\home\dev\depot\flex\sdk\frameworks\libs\framework.swc C:\home\dev\depot\flex\sdk\frameworks\libs\playerglobal.swc SOURCE NAMES: C:\home\depot\EN\Docs\Flex\Flex2next\oem_kit\code\apps\TestAppWithAllAssets .mxml DEFINITIONS: TestAppWithAllAssets DEPENDENCIES: AS3 MyButton MyLabel mx.controls:Image mx.controls:Label mx.core:UIComponentDescriptor mx.core:mx_internal mx.events:PropertyChangeEvent mx.styles:CSSStyleDeclaration mx.styles:StyleManager PREREQS: mx.core:Application APPLICATION INFO: Background Color: 0x869CA7 Height : 375 (75%) Width : 500 (100%) Page Title : Test App With All Assets
使用報告檢視消息(Message)
您也可以在編譯期間獲得消息資訊,消息級别包括資訊(info),警告(warning)和錯誤(error),您可以使用Reoprt類的getMessages()方法通路Message對象數組:
// java/MySimpleReportCompiler.java
import flex2.tools.oem.Application;
import flex2.tools.oem.Report;
import flex2.tools.oem.Message;
import java.io.*;
public class MySimpleReportCompiler {
public static void main(String[] args) {
try {
Application application = new Application(new
File("../apps/ErrorTestApp.mxml"));
application.setOutput(new File("../apps/ErrorTestApp.swf"));
application.build(true);
Report report = application.getReport();
Message[] m = report.getMessages();
for (int i=0; i<m.length; i++) {
System.out.println(m[i].getLevel().toUpperCase() +
" MESSAGE " + i + ": " + m[i]);
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
觀察進度
Flex Complier API 包含一個進度尺,它可以讓您輕松觀察進度。
1、使用進度尺:
// java/MyProgressMeter.java
import flex2.tools.oem.ProgressMeter;
public class MyProgressMeter implements ProgressMeter {
long before, after;
MyProgressMeter() {
}
public void start() {
before = System.currentTimeMillis();
System.out.print("begin...");
}
public void end() {
after = System.currentTimeMillis();
System.out.println("done");
System.out.println("Elapsed Time: " + (after - before) + "ms");
}
public void percentDone(int n) {
System.out.print(n + "...");
}
}
這個類必須實作start(), end() 和 persentDone()方法,這些方法加入了在編譯過程中的計算時間的邏輯
2、在編譯Flex應用程式的JAVA應用中,調用setProgressMeter()方法為應用程式指派一個進度尺;例如:
application.setProgressMeter(new MyProgressMeter());
3、編譯這個應用程式,進度尺大體輸出如下:
begin...1...2...3...4...5...6...7...8...9...10...11...12...13...14...15 ...16...17...18...19...20...21...22...23...24...25...26...27...28...29. ..30...31...32...33...34...35...36...37...38...39...40...41...42...43.. .44...45...46...47...48...49...50...51...52...53...54...55...56...57... 58...59...60...61...62...63...64...65...66...67...68...69...70...71...7 2...73...74...75...76...77...78...79...80...81...82...83...84...85...86 ...87...88...89...90...91...92...93...94...95...96...97...98...99...100 ...done