BlockCanary原始碼解析

隨著**複雜度越來越大，我們越來越難定位到ui卡頓的問題，所以需要用到blockcanary來定位卡頓的原因

implementation 'com.github.markzhai:blockcanary-android:1.5.0'

blockcanary.install(this,new blockcanarycontext()).start();

public static blockcanary install(context context, blockcanarycontext blockcanarycontext) 

static void init(context context, blockcanarycontext blockcanarycontext) 
public static blockcanary get() 
}}

public blockcanaryinternals() }}

}}, getcontext().provideblockthreshold(), getcontext().stopwhendebugging()));
logwriter.cleanobsolete();
}

public void println(string x) 

if (!mprintingstarted)  else 
stopdump();
}}

private void startdump() 

if (null != blockcanaryinternals.getinstance().cpusampler) 
}private void stopdump() 
if (null != blockcanaryinternals.getinstance().cpusampler) 
}

abstract class abstractsampler 

}};、

protected void dosample() 

if (mpid == 0) 
pidreader = new bufferedreader(new inputstreamreader(
new fileinputstream("/proc/" + mpid + "/stat")), buffer_size);
string pidcpurate = pidreader.readline();
if (pidcpurate == null) 
parse(cpurate, pidcpurate);
} catch (throwable throwable)  finally 
if (pidreader != null) 
} catch (ioexception exception) 
}}

stacksampler 的dosample 就是把卡頓的資訊通過linkedhashmap列印出來

protected void dosample() 

synchronized (sstackmap) 
sstackmap.put(system.currenttimemillis(), stringbuilder.tostring());
}}

azkaban web server原始碼解析

azkaban主要用於hadoop相關job任務的排程，但也可以應用任何需要排程管理的任務，可以完全代替crontab。azkaban主要分為web server 任務上傳，管理，排程 executor server 接受web server的排程指令，進行任務執行 1.資料表 projects 工...

JDK LinkedHashMap原始碼解析

今天來分析一下jdk linkedhashmap的源 public class linkedhashmapextends hashmapimplements map可以看到,linkedhashmap繼承自hashmap,並且也實現了map介面,所以linkedhashmap沿用了hashmap的大...

Redux原始碼createStore解讀常用方法

const store createstore reducer,preloadedstate enhancer 直接返回當前currentstate，獲取state值，return state 我覺得應該深轉殖乙個新的物件返回，不然有可能會被外部修改 function getstate consol...