上篇看了关于Request的源码,这篇接着来看下RequestQueue的源码。
RequestQueue类图:
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pmNqTHxubcDP+jfWmckj4RxcySfBadE9qGx/N4n3YnyIyZuLcrYMyPM0Pg01Tmo/dweR52fTcX8mE5/LXkmZvxqyEzAAAAkhMrM9xxKbNzDtqGYSljANTWStljrvoJslPIqw9lMVOIOah3yIqWDWHAzPimKetJs7ul45lfOTqdVPgs9HJYngIeKJwEmbEv+vS+I+tNXL73HTkv7Fooz6Ou7/ZCPuwO/LHkedPUr/ZGZgAAAKTmHbNuxikDwVMedPW6GVkNhc8kMz+O28nkLK6YQ9bN+NmQGQAAAMm5p8xYvQp4VhFnHpnpmsdPD9TzOIvr5ZBVwPcwQWbk8H5x/Pjx48ePvyR/lMzAMAwryN6smwEAAJAaZAaGYXczBk0BAAAk564yY+WgKQy7m7ljxvIZRRafN88YM2QGAABAchLKDGOxgokshpWvngK+b0hkfXtk4UREivMLrIp5ZWp+d+AFSv5HmZG0zFflTZoxj8wAAABIjldm/P7k0l2e7+tbt+Fgc97EmtQil+c7pnBCmZleqzqVUp8Z32tVr2PZ3YFXKPnfZUa6Ml+XN+H9v8gMAACA5ETJjO5VVc96fDg5LxJnLikwPYtV1asb1h1Tyl43w1zN2nzYaaQQc9DuVVWvpja2MbMhHMVanq+ptdTsh6/zGghjlpwlC8NnoZfD8roZocLZPzNmHOYsEqevSC0vEifeM4HyPOj6/lDIB+UwaclLKwbamQxne15VZjp9c52ZzWV+St6k1QzfyAwAAIDUvGOX59NidPVsxeWQx9iorc2QQk9qHsBgRnvmstZt/WxjDzrGf33Kdjaco+gxh767sKW08LawFlvwLAIl6ZZzoHBSZGbwi+Hvv7Z25q70AVxgsFm4PI+6vtsL+bAcJi15MZQXMml69NT6FVG00x+WmffdZvFlfkrevsIaL8gMAACA5DgyQ3tkPuJ0Rzya1h0R0e+oPZcVni9qz2V157CjmYL9NFQ6qBxqK2nN5vkJtCEzFvLjhKFSkBQ6CymyFyLIqMLZPTNz0OzeA97pAUPA7TmXDK7vb4V8TA4Tl7zUY7DgcUvJvprjyf5Y5qfkzfkNvlk3Az/+I/1vpTAMS2dZ/d6j1s3wBS5emaGrFE9vhr6lN/geU9gY5AUSGcwrM+wt4yL78FmEztQNpAKFkyoz0jN1fdCOEziGn6mHyvOg6/tDIR+awyNKPj6U17sjxG30UH6XMj8yb8HeDNbNAEiON9TAMOxn88mMHFgtM4ZhDMLokXp4CvtpqnG0tBvazk9knQe6Vgpt1EHdiMTMhvTYWBzCITxglsYp6RNRzCzJZ9E5YVZ4bIn3aXeCzJiJex9Lj/lxZgh8msp89B4uz8Ou7+ZCPiyHSUvevTFWBvfuXubJ/lDmp+SNuRkAp4PMwLB0VoLMUBPuaJA5aOuZWvS2Vsoec9XP5pxC3mmfabTJmELMQQUt5GTDPsq/+U1T1rNPd0vHM79ydDqp8Fno5bA8BTxQOAkyY1/06X1H1pu4fO87cl7YtVCeR13f7YV82B2YtuTtGyMmlB9vDGMvt2A9t2J8mZ+QN940BXA6b2QGhiUzt0nLh6jffuQwiX0t5UFXr5txSglknhlnIMolz+KKOfyx5O9mrJsBcDrIDAxLZ8iMLZb2oCtXAc8q4swjM13z8I8FusxZXDGHv5b8rYxVwAFyAJmBYens8jIDwzCsIENmABwKoQaGpTNkBoZhWD6GzAA4FEKNLWZMEFRiz2xKc96Ib6x4EHh1CXa0ITN2tZXjnbBL2KqXpe5onkE1WNkmyIwc3i+OH3+p/guGGhlYLzOMt1scGdxbMkP/11Ug2Jnmkxk51AMJf/viu19+FuSrZ2/vcgq+b498yhARgs+v8fEt8XaKGTkfX60rbhMvM3a8qaQpwljZ9mbdDIAjQWZsMV1mWJF9+5ybv7EBa2ujVazbcbP6b/p2mNi3tHvVfMzUnk3z0GOLbvo3/hBrMoOtMp/MyAHvb//358q6zNjtznFe5ZnUFmWGtFjBGZmZ3og6lVKfGd8bUQ82TVr4zmKDzNjtphJeeIqVbW6dnG8dDVAAyIwt5vZm9A9Zu1c1RfztMxTui05p985UEd/vP0vYGMLgq6UcfYgVW55e8lezy8uM7lVVz3p8ejwvEjeq3Hm9rVmO9uuOKeWsmzEl3tRqWiZ5+Owma31rrqwn7TWJEG0Moedl/O5e3lNYXvLCXKU7dWbmwhTXd9MXkxbXd/NccT0Dm6+RW1D6+mjt01lNQluAwlsauhJwFuT+8aaSlm/Dyja3Ts63jgYoAG+ogQXM6rUfB3LMwYH2lS4DwjJD3F13js3hdpkhHmLFlqeX/NXMbdLywfvbtx/Vj4HjsKCvtBzyfDeaK5dZv5RxdS1drmgRpJvsfGPP4aC9lxbij0G5vWa2sIyauVfgFL5S9Kx/Ow+8OSQzg1+Jg4Xa2vmd6s9BZBMzsOUaiTJjWuqhrfstPctp+0pDS2H4sN9NpWcPu4khMwAOBZmxxabejLHBm1sy56n/WpkhPFrTBy/Vf5bM6NYMmpIPsSoz2Bq7lMzQXyQwhnBGd4TzLHkIiJ0ZQYFBU+LjfPfz+FhaX0t4lhnGljp9Zpyg2V1sWNjLcwqi6SkcnZk5dHYvn/cHO0jEpXPpj7v1GnmsL4RxEJcvEW9pTCmMQmW/m2r5QmPFmVsn51tHAxSAE2pgEaYPmho0wKPpps9Gc67H67bMqF6d6wxHA47MkKaAa5mJOcSGzGBx5jZp+eD97fsCNa/McO7DI2WGHSPGRfZyZCmdQriI9BI4MDNSb4Y+XMrMqgr2ZuwbtUvW1o+mfVXTyNKwzJASbGtVt+MJ7pthejNuZsgMgENBZmwxXWbMU7THYc3as7iq+Xy1odU9dfvP4xR2NwYvjUfUnLq60LLxXXGINVueXfJXs6JkxjA6SBiIUg/3xjjfdwq+4yNC31iaaUdzbob/0b40Tknv+jNPYcqV9xS+EYOmtJ9h8syYiQcfBIhzMz5NJcz1sjKw8RqJg6aGIgoOZDIGTUl9NZ02VWzHm4q5GfczZAbAoSAzjjR7HsW+ZoofLAcrQWbMStOd6Gyr3Cli62/1qn7a7x5tfRGhZ2bwnLHxTVPevax3TM+e+WWv0xgwexv/KSxPAe/Td54yJMqMfb2mN01Zb+LyvWlKemGXlYFAf1H4GvlkhtXTIiZidBCZZTicjvbGqt1uKt40dTt7s24GfvxH+t/IjAMtrcywX1Bz/vlibpN27u999boZOY1cX71uRk6ZzyUzFx0jlGiBC9bNuJ+9WTcD4EiQGRiWznwyIwcuJzNWrwKeVebzyEzXPK748H58S9WuxirgtzShN+OU+hfgJiAzMCydXV5mYBiGFWTIDIBDIdTAsHSGzMAwDMvHkBl35K2Ubmdn514QamBYOsu5QuO3j2HY3QyZcS9GXWHfBDm3zYVBqIFh6SznqozfPoZhdzNkxl0QBYZ1K+TcQheD1ZWEYdi+dvZP3MsbmYFh2M3MrZPzraNhM/HNW86NdBkQamBYOsu5BjtdgGEYhh1vVk3Iuhml+d8r41rrnjg9/4X5114ODMPizW3Szv294/f5w3FJPvm8s9/9NeWZT/zX8uf7KAi28aPMgH1BZmBYOqP6uiiBZ59wFlwOSAG3VFFsC2qpWdKBzMCwdEbddTn0WJbLlxX95eCiwL5wPxUFMiM3kBkYls6ou66C1XfBg/MMQf5BCriZyuGXiJZqJRHIDAxLZ1RcmSOOjOKq5Yl+XbhGsBfcSeWAzMiQLRele1VqoGo+p0dyXfNQB+Sne1XVq/spkU9TKaUnsiFNcZf5ijzbVJnHthgVV7b4+iu4ZNmCGoQUcBuVAzIjQ9ZflL9aPZpu/Fz/nRvGdc1DC9w/TZ0smP49Uu9eVfWsq6n0do3+w0khM04yKq7cCE/s5nrljHt1uF7wO9xD5YDMyBDvRRliYqWUqttPM3z49/3+1e4j8/lpuqZA5i6GV6eHudNna6/uVVWvZtytbu106tY9kK55/PkRU/Zu82yNHpI+/aEEhg4Tq/fA3PfbvSopV13zqJpPW09dLotpSuU/l6RTMlOp2ifrO9CYSa17Si1cGk9vCeYxKq5MCKuLaZvD8gMbEC8QVw1+hPdVl+PfRWZkeF6X9odkRh9itk81fahe3fdf24ewcz+GJjyGYPfTVFo0L8sMZ6/uVU0aYDiWlo54IPkhfUzKwW10a5/DmZrxfb9l1zxU/fe19pVlxqepjGKMSFMqf7eEraSEk7UOZF2s+dBRlwZbY74YKLd6oGC/qC4yzCf+Rb/v18T1xf+LH51aFNuUBo8r0mFdkekpflU/KytCtWL69jmIDf1Z+PAwPqgHtMjV2EvcxprJ4N1lfGAfn3Jgm6/nAb9bDt2rcvcVzQj0tW6ExTStDz595UvKTeT3wsGijbrrLGK6L+BaBK4mFxo2w61TFMiM3Aj1ZoRlxvff8Gjc59fTWZQQXyk+dkN/4UDOVIcNKbvbBJTAJpmhz1NX01T1U2SGtaPbuxIuHGyNUXcdDOqiYMKXlYsO2+C+KY21SoO6IymrZUb3qqbhUu6om8GkQVOj8BgnbTt7CfGxO2jKHrpjTAH35UcesrW4jZn+fArSACe7J8QaNGWeiD6WaTFNUWaEB03J02DsA2mlammqYOFga4zq6zBQF8WzeH25AWAD3DSlgczIivW9GfN84rg5xINHHo6lb+ONjwfMKeDzm2GFF9quTNneZpp/oud2dPqmgIdkhh2mz5H9cpqyzDBLptH29egl6UBjGfbj3wKXD5mx1ai+UvOm++I2xFxl7gRYC3dMgXhDWxrpw4m/FhuNCPVCNs13x3YyarBEoC5uSOTl5q6AVXC7lMnYQoSaZyqLA0BmYO387mHeV7uzUYntDk3DbYm/7twhEA/3SsmIYoNW5EiSywwMu7FRle0F3RewSmZwq0AkrJtRvn9qP/SqIcN8FulHZmBYOvPFOrnVA9n6aRfwT/7IuRlvRdyIf4UfPQqQEGQGhqUzHqluhgfSYBG4H+jsgs1w0wAkZLXM8K0voa+VIW4fWn/Df6z5FUjuutp726ppJH3etAnTbT2//OqnPExveLLW1ticVY8Jb+hKbfld0PkFaGlKgLhnLcSL4EO8K7hb4Ee4ewASsr43Y5YTXfOoqoexPsZvMV9oF23ljROjUnPjZ13pK048fgj9/+phwQpNtvUaJs0cemO9ke9fnVxp/NXum4XPvKB9gWv/Dpn5NJWYq7X+wQiAIkFdwCL67aHfMNw28AvcPQAJ8cqMIYxWSqm6HdbK6BVFW09rPjzb9jmEp+MH7Rn5o+mE1TaGlSi6V1W9mvEdR7NWmR+wW8s1mCuL20/E/2rfjsJCE8Nec1atHDYf8yvvUhht8+jPuq1V3QwHkkpgKEnlLC/4HY47rZ1nxax2uTW1mhfHiClDX5AtruwRU25xZSuf4HkX1FPgrswYDy0U3Vo/MiOKN+oC4niPosK6Ybh/4Be4ewAS8g7IjD56a59q+jCG0VXz+X4/Tf3qxqfCbe0E0P0iDIFl5qbIeEhZW3zajXqnlbOt8NRaEtsbLjt7aU/T29pZEc/9Sl5x7682g/5OLIFp3/apB7htbcflw7tl9cUrzKjaWVt9qQx9F9f+SjuRxXJb3MZ3gmddUH+Bz35rwRBnUNw2PwGQjzfdF7ASbhhIAbcUQEIsmSGv1e1+6KPn+m8cNKINHfH1SPhWsw573Afzxvj+/rF0RCgs72U+1Z73cr7yR+q9MBhWKF9eQnvqRtD0gGv9stzWoKnIEpOWAN8uM9xyiypbzwmedkEDBR4cMGbKwg1+oiIL1AUAZAWV0S0ZY7ez81E+79CgKd/U7b9aPdv22QdtXfNsunGku/7k3goQF2XG/Hhb2tfzvHwOkePjbyfKlIb0LIkNN29z+OspAUNm/Pv6H64bJ7VKZrhlKGY+ftCUm8iKsvX3ZpxzQcUC97+6QNGbsSeoCwDIEN5/fGm/tr6wR8ylgp8AACAASURBVDbI6fhlRh7nVY5/k8z419aPqpoHAlXVw30t0jDJOBCOC8Ng/AH6/JzYfSwtjbHR5qnbo4nGg9bDM+xPU42zDsYcSl+Jg6ZCkbpdAl99pJCR+TksnuJUX7mFg2+3DMdDWA/s3SngQ4dMRLktbxM4wVMuqC8/sh0xNyO3eiCdP9x9kU8+8V/dr99jOeQH/1X8PPy4Lr1WqJpu6670ZqRnm8wwgtROmyEwzS4wp3p32leuf065HywkDzfqB3RN4aM59sbxyKO/jG3mScZTCD7esi/7q3iZIZaAMbbHE9pWxqxlZXd6aCcSkhlOGQ5xsNBnor/Qdrp8EeUWtY18gqddUHdM1PSmKatweNPUPrwZHAXHws0G2+C+uSpdUylXZHSNPqJ6/lbv9qiabogOqsraztrs2DMqkneey/P1k6c37BgaKXSSnZWlqQzDhZlhiV0oe0t2w9AHdQFnwY0HG+CmuSpLHRKaDDG6PbqmnmTG/GXdDnsMW7U1QmMXspIZmorcuqJChlHpsVlyy7BrHv4RTfou6dfLy770drf7xD10XwDAFaHOuio+meH2Zwhbaq7po7mjCosYiCQrmYFhhVnxYTfqAgAuDZXXVREHTenOqUNilcygB2NfkBkYls5Kjb9RFwBQBtRi10WYAq65IgZNmTJjnJixQxfG1Eb67OcjXAZkBoals/Iqk7vVkHAtuDlhLdwxl8Z9oe38Gp5K75wQp4BbMuPrn0G+nnuKCpeNMkN/ndG2udphM17nOpF+8sDamQBa9rxLvC2mmd85zq918p0UFmfFVC/UlnAVuEthFaybgT+Vf6qM9BY0w3wm9W+QGV3z0Kdot/XW6doB861Jt3lq+NrjRpn+LtS/2ie3wsvkue+lPfMcp9e8TifYZ2bj61wxX8STWz0QqB9EdZFbPvHjn3gr4kb8K/yoUkiI1YLe8ImdV2Z0r6p61lXflTSs51C3/+a1z3yRq7akQ1MrpZ6t/vmrP7wf10wYvtUPMXYR6ItFWItD24//52UT7DU3hL6RYa957Qhz2Yqq+ZhfSUtniAtI24cw0jQDdCUtVn3oOcr5kU9wy+J02HUrk7vVhABwT6jmIDlua3qfJjYkM/o4tX2q6YO5HrOxsSszlLaQ87wAnBlGW1tOi2SLvRnzEtpOIuK60cIK2e6hB8/QJ+Ouva1/5YxoGqcLTf0YbsaE3oO2VsbgqLPO0Zcf3W910fQaxu238flvb5erRm74qAUA7gyVHRyB2KzeocW1ZIa81rL+QRxy4+nNsB+0f/Vn7T1DX4fwSD6wvLSbiBheS8rH2ct8hD/v5XwVsH6mSv0nZcztrFD2KhannaMnP6PfOzGjfcol4/Pf2K5Se9yhrgMAcKHWg4MINLEFt8Gh3gy5Y0GfkCBFrosyw1IpizLD6V6QZhfEheDy2B4tELe3iRcbf7UlmcQT/P77BnozzjlHsTdDGg/2pTdjteVfaZRas8HN4a6GSLhRICPK0xvrZYY0BVyLj7vm4Z02MMa7xuNz7wQDJyaeH5a7z+ClAUVWlqRD18MD+3HCiXZc6SszFu9e1RRYzxpM7KxwQ3bP3Iwjz9GXH9mYm7HFsq0ryqvKAHS4tyESbhTIkWIa6Q0y46vPKh6fYdujrQI9GNYYIc+Ww2IqxhTw/ihTrGwONHI88gAwY5t5RvU0QGhcxOVlfyXMzfho71cev5JGQI1pumOQnDdNHXqOnvz0H4yT5U1TGy23KqKYigtgEe5ziIG7BLLm6s22V2Zc17wDhwqyO5xjEZZPzXDpagoAIBG8/zgv/9RQZZKffPyW3jg9P5F+ZMYl7Q7nWIT5InvqJfz48ePPwc/Tl1zgYVgk1+rfKFBmYFg2dlY9cK1aCADgLKgl4apcoplHZmBYOju+BrhEtQNwDPwWYBFuEbg2mT9WPEhmMMhnW4FQbhe3w374mdczAGfBjwLCcH+cCb/PHckzDtgoM/oF6XpiVkuIDpf1d1h5l4fb0Yz17IKrmy+eWmBjc9W8ut0qM1aqjqML0z5TYWXx/Q+3VCDzy7iOKQHTUv/e86xVAPKBXweE4f44DX6cicgqMtggM4R1M/YIB7/z4g/9v8GFqFPEqe3zp/UfwjIjdh29LeWWR2E6L+eVF+hIdvnE/Oj/Dpk59OW86X7m+dQhAADXhWr0HGjADiAHveGVGd2rqp511T99HxaIqNt/8ypvblBrP8OeV2yom1dVvZrx/3mNOWMXZ33xwILi1r4x23w9S+wZsfiwkndTK6Wv6j0nNS+oZ24zr6FRNX/zOnr9SbWmmKn/pExOMa5dbl2/15ROFy7MabmMxIVpBOhKWmLcXLbcf3t4l09x9ppvM7vMP3J+BJnx78ilBnf/dedQaQAAFAOVKZTPiaFDSGb0sV0f4Hbjw/7FR9R9GK0vWT3Gi8O/Q6eBGYPKD/jnuN8MQIP7+rZZkhnz+uXKXGxbW1q7ax6DSLC3cTpG+rFkk6iYQmojlHdSdstNL/P5X7cwnQXCUxfm9993WOlPK1K5d8jdXVrRPCZjo2foQ3NO086P7rdG9/UXxR3y5/OfKjNQFwAAKWDdDPw38rvBxMHrZsirSusffMNUAmt7W+GgFitrmBFwODIO7+vbRgwExZW2AwOc+kjX9+jdeZDf1s5MDD3NcMpz9pZkQNSgrN0LU9M2gfK0nMPuEdpG3su8lHaZO/kZ/d4BY+1Tvjd8/p1kRvzvtK8Q8qyv8OO/ir//JeaTH/z5+Hl4cxA8KsuKwy7HOzRoSpIZ7micr9lLIIa5sXFw3Dgfd9+o9IOnGZlUrMzoBcYYTLsKJF5mVK926OjwF4g+q8R3mdIUprc3Q+t5kGZQxMkM+aCa2IjqzdCHS1k3bb69Ge4TBwDYDD8l8MGdcQT8AvPkgFBjvcyQpoBr0d4481ga/GPHwfazZ3fW8tAVMB5u3MDZN2ab7+LcjOWszoOmRJlhPWifHqK7Q4l8KXvKra1V1XyC44tMmXdAYc7mmZsxdwi4u0uDpiIyVg+dEuMEIavM3fzIlu/cDNQFQCL4WYEItwVAwuBjg8z4mm9K7Z/7tuN8XmO01bRJ44vL7QE2espTiCkP5TL3jdlmq8zQk3KCae1zXwiVFQpbObFSsFL2lttfPZ2aeHT9FcPHFKYboztdEF3zmOeiCNdi7UHnWePTICizzJ38DEWnX/RM3zT1Rl0AABwO1S7AzHtvvfHOcxXwyCFPOduPr8f95bjuXOecCzPz7P1miz/V3X/RAAAQD5VvKmjYLs1e0UmmMmPuHkm/xFuy/PtHGaUrLiUOFsq6MG8pM1AXAAA5QC2cBJq3YvgxXslWZmBYAeb+MFEXAGfBTw9cuCf2h19akWzTG8gMDEtn0++R7guAHOA3CBZR7wufanAsZ1u8jvh38YsFHrluRkZW9Fiafc79zkV0EfPVfhnWG/jxL/pPjyKwvSyr++oC62a8sw2VsNECdzYkIqbMV/929Pe0foOR7o9BsLS7/uok74JrO5r7hqi1J+hZVcN/FGc5v/giWlngRxemfabpJ4pEFMj8eqs0JUClByVBrFWGUS/pIDMKsf4acXMfT/jpxRaZUT3ryl6lwbPlnjLDXQgieXDsrnex3+nIX/24tmC0HV6Yzutu5SUvkl0+MT/6v0Nmdn7dLTUelASxVhlGvaSDzCjEpmvE/X0Wot7w/nYGOdE/X+/XO9MetE9vTRXWf+gVyLCLspdBMIM5aT2KplZKXw+7fSr1aLroZa3dzMRs811cVWNevdvO4fJZaKXR/GkL8P3V6tG0ppjRl/9zV9XQ1o6YV9Xoi6idC6QZN5qXwJt7LtasEb65MGfzLN5nLQRu7z6fporMmN4/Y5f5R87PbPpK4Xsu3kd1ByVBrFWGUS/pIDMKMf0acYufi643QjKjj96GKN9avnp8Yeu8CrUWMtrDhIZvu+ZR18+6/Tc+S5ZW11aexaGFJ9Nz3O8siW1mJmab74LMGB7/uzmMOQsr/5NIm0TFFFIboXzcGuFWEelHH3pgtOW0vb0lexfm9993eJGuVqRy75C7u7RGeEzGRk9by/eMnR/d7y42ohxnwB+q9wAKgVirDKNe0jlIZqg1Kfg2DiRifbV4uMj8iJu5zlVnl8isa8RdngOj2Jivi7wSs/5B/NecXeA+um7rR9P9a+tn272qPrDWn9l/x44O26OUJ379fv95I2M3MzHbiPet3QmwNMBJPAthbsYQIptSzUkznLKviBZzuEpmbC9MTdsEytNyDrtHaBt5L/NS2mUurmQSHDDWPuV7w+eX6z2AQkBmlGHUSzony4zJr28QLyd0/4T1r34IH75DiIezdvGlc8ZtzY2eHd7fjhsfOwFf1zyGcTtC2Gp3BdRt34Pxaapn2z6F8FoKYdvhKf6/b/w4HzczUXF2sBAik4qVGb3AGINpV4HEywy9iHwFos8qmbsCjihMb2+G1vPgFZBrMzbvq6QxWlJ+rGNZp6nozQAwQGbI1j7VmmrhdKNe0jlCZkyhv+8r67MviPcpBGtHMR3fscSM+VKwvvId97zbmns9O36RGdpodd+j6zlYrKtH/8y4a551/Wy6f19xuJEToLe1Gne0Zy0PWmU8yriBk5mYbb6LczMczxyyL5+FURrDv+NDdH17Y2Ra3KCpqYh8EbkuKsZvkxfmbJ65GXOHgLu7NGgqImP10Cnxaapx7JkgIcS5GboxNwNAJonM6GP0kTTvonC6OlfmauGHP8qMfjjAQS/u+8Gol3Ri183YXNyRAf3XLzMiE9+ck3hV4ya4uM2xt/WK2z3P9yuX5/9NZmgj7KXxMG09NRtapGs9XB/2ccLQ+fM8rEV/B+sUYsoDvczMxGyzVWZEnoVeGv/mUNjKiZWClbK58TwFvC+i/tTEo+tNptbFlLAwbXPeNDWkM+kB91qsPeg8a3xq5s0yd/IzFJ1+0Q9601Ru9QB+/DH+dzqZkbYrYKvMmDqKw7uX0puR2/1WwroZylEOykxKSSmLzlWH8/3rIz41fRfrpDZne7/bet0dDweQpNlIbZFDnnK2H1+P+8tx3bnOORdm5tlbMio3KIljZIb+dGB4vuB/XGI7tdT6dOp2+DAyvI9k3mnqVZ5TeLZmroxuCjcb08bDh9f8bsbpW98pGMd9VJUyX364ugeVemktqWSGFb4rp8fA9Ysb67uEtUGMJ+Yr3zY+URHI0pH23rQmJaRmw28nBxubjfRLvCXLv3+UUbriUuIDuawLE5kBkA1J2gtjeNJQC43TqLSRivpA0/Y5BP16BP/9NLUsM+zeDHGbIaZ/DB0XlviZ/g1kY5YZf4FD2Pv6j9trmxQtBfWSzhaZIQb94WjbF4IrSW8sxuvuBtNxfflZm2dlagk3q/pevlNePJHDjJv+LN7Z3AMYVp5Rs0FJJGkv5BFH07o32qQsi/pPExJCaj6ZYexl6gdRiuj/itmQ1MV0xHkymLyvPSJL2JF6KSlpB01N5gu4A9F8fFJuIu6WylFKMWm6H3RZYt/Qkhjb/fblpr8WyAwMS2fUbFASB8qMaaqVITOseVb7ywxrLJYzaEqe5C11Ygx9Ec3cgyHv64yMGnasn8LG1EsJOF9mLAqAMNaOPmmxSmaIO8Z8iDzr442b/iwOkhkHD325+EgbrBijZoOSOExmtLWaF8MxZjWYT/d9g6bGV/CJMiM4aEqSGfpXgWyYMkN7R4X2+hN3X3cChrsj9VJKzpcZ7r+B6DzmKzH6XytXFtPfnM4pxk1/Fht/O/po2pjXa/wY9x98OAzbyajZoCR+j7UEs19o+6fPnzamgBsv5fNNyJ5GW40thp6OUstTwKVceWTAuLsoM6Zpb3qb5e4rzfMWdqReSsbJMkPfICZGD6TjfhVI0PdvTPpTVmP2ysS46c9iw2+nax7685i2jhg8+kPcf/DhMGxHo2aDkkgiMzDbPsaLqhIY9ZJO8nUzeguH7+K3rhLwbeluv2rjRacogaa/Fonu2t1v+jzfr1ye3/vb6V5V9ayHyk6v9bQFHzTTHg5N387rGPQrPDTj//PKa9Yu7soVSQ+HYYnN15znVg/gxx/jR2YcYcneYzsZ9ZLuP6g3AzvX0NZnEZIZfTjePtX0wVyPWbZhZQZnvWp9yt2wmJq25Fxggbx0h8OwxEbNBiVBrFWGUS/pIDNuYdz0Z2H9duS1lgOrgE9mLclsbeYuTW0OUfW+tu/gw2HYrkbNBiVBrFWGUS/pIDNuYdz0ZxEcNCXJjO9f7Q460nshRDUixv1RXQoHHw7D9jRqNigJYq0yjHpJ51eZsTgbQTmzGjZss3bOw+YDuf74/PRPcVflPCY/uxg3/VmslxnSnGwtiO+ax/S6D2MUkxX3f/9qd4qbMDcj5eEwLLFRs0FJIDPKMOolnR16M36JpJU5ndqX2uRUJvEHsg7nEs5hTDo/Fo7v6D646S/BBpnxtVYz1d4+rqzRVtMmjRv3OwOfvrLMSHg4DEts1GxQEt72AruUUS/pbJEZgdh3ioBjttETFD+Hvw1sKUbhgYOK5+U6xaO4WYo/98D2gRMJ+Lnpc+NNs4FhyYyaDUrirRRWhp19K2XERpkRqPdVtIRQDl8nrFdLMb0vKSsdK6nwBoHDiflxN14sKN9phkss8hLQGOfDe+WVwjAs3qjZoCRoL8ow6iWdg9bNCJhPCejf+hSCL0H3X5+cEA9qbe+mY30WsxST57Cwcf9d9Mff9Hm+X7k8P80GhqUzX3OeWz2AH3+Mn/aiDKNe0v1bejN6WwyyA+ibfSUNEKkExAu8uK8vPz6RsHhoMSeu0+cJFFE6mQHHQLOBYemMmg1KgvaiDKNe0tkuMywLBL4xcb/41919UWYEdvfF7j754UszIFesrxbLRzxQTKkiM65Cvs1GVq+gzSoz2HWMmg1KIt/2Altj1Es6+8iMcNQbDrjFf8VQ/utXAm5q4Q+LXQc+meETIb5T8EmRwEn5shRf4Nz0+bC62ehelVJV85n/9cXfP4bmMbtnlRkMc4yaDUoCmVGGUS/pbJEZYlgciP6VR1cEAuuY8Dp8IDdS98XuizLD5/GdQvgo8RmOLAdu+pzZIjOqZ12Zq+N5t0wvM/LJDIY5Rs0GJYHMKMOol3R26M1YDHmtuHlDbK0/+PdtthiR++TNBpmhZ2ZRvQSyZ2XJV1wxWo6bPk+8v50hgldKqbr9NMOHMeBun/36FdKqFH3QP+yi7KUt+oX2Pk31bI29xn+rV1MrpbQ1+NrnkKa7qsaJmdmvxscKNmo2KIktj6XmoODsmtPIzLzk6/Jem58xGUfctQR+e/JFvaRztMwQv/VF8L5vw599R1/UA+E4fsqYlUM3k+GjhLeJ2SumzLnpMyEkM/o6cQqs26eqXt1Yu7W1pjq+f/VUawvL+Q3fds2jrp91++/7/avNlbm75qHqv75SHtbq7nefxYBfZpySGQyLMGo2KIktMkNfKfXc+lPPTN+crd3rlyOmO5f1Rr2k85PM8EXk7maB3fVtwspBSfjSd/Om64TFdBZVhHuIsCLync5iOrsYN/1ZWL+dab1t46m//kH8135mM/cG9PVgWz+a7l9bP9vuVfURfP/XaoFsj1p45pRVZjDMMWo2KIl34LFUoPd72Mx8ADTUz8OTo6npGR9mDakp/VmPU6U3tbGNkYh7FDEzVrJ2IlpPePMRExx6vL+hB2FaWf3V03zCaXunNPrNhlNrzJYolCunH556KYLz183ADjD3ps/z/crl+YPNRlBm9B0Cje0UUui3bPtOg09TPdv2abdAYmRfvdq+Y8F352SVGQxzzNec51YP4Mcf4w+1F8He7+9X70BwOpy1jo7hAdAUcLdPpZ5tuLd5OpaeiHgUrRVQ3k5sPRGhJ9zM9piHr0dm6I+8jPG6n2aYVeh2v3+aykzWlhlWrvwlQ70U4d9h0BSWv6Gtz+IXmTE8cTErayMFrfasq0f/CKdrnnX9HKtXp3506tO2dp79uJk8PjMYFmHUbFAS7w2931aQ/XVnLAwqQrmDXb//vt+/Wj2advkxUOcmYh3FzYwwpstMxDojN8HwyCXPBn25ae1aMNmwzAg/IKNeigCZcQvjpj+L32SG9oBKak7aeuzV7ZuKztzF2Mse2mQ9rRm7hoNd0kdm5uyfDHYJo2aDktjeXpgPejxx8Bjib5QZgUQ8xxVkhpmIeGqBBH3FYln7NGRGOFlkRmKQGbcwbvqz4LeDYemMmg1K4qfHUsPwp39ft8O5e9XDs5tPU5miYngSFNHbbCXSCUcRZ0pYyZqJ6PJjKcHFB2HzQftuk4fVkT6aM2hKnzdiy7ZgyVAvRRArM7CrW+o7CUTeyAwMS2bUbFAS3vYirve7ax7KnvQ8j3Qd/jPmNCtpEJSvt9lM5OscxTdtzziQk4jeEx5OcHFuhjLFz6S7xNFco6NupcFpcq6ckqFeioCyAEgIMgPD0hnNOZTEQe1FRKCM/WLUSzqUBUBCkBkYls5ozqEkkBllGPWSDmUBkJBUzQbtBMWC0ZxDWfBYqgyjXtKJWjcDP3782/yrmw1zsKn35dzia6n2NSMn5ojY4y2fYsFyMl9znls9gB9/jB+ZUYZRL+l+JBdAQrbIDPMNsHJIfUAk7X0X4RmWT7FgORlPDaEkkBllGPWSDmUBkBBvs9G9qupZV/2z+U9TjQ/pfa/0nh/njy8SmR7b2+8jt96tMW/f1P27MvTX+Y1v/Vt4V6C5kKrZxTG9pmN8N8hwXnO3g/SmjqY2tjES8Z3v8cVydnOFhY3mHEoCmVGGUS/pUBYACQnJjD6QbZ9q+iAM+JleAW4uvWSODmpr7RV+9Z+tCsbFYucegGEz7UNYZsyr7IkpD5627heC1dbmG5d9td87rr9z0E3Ed77HFwuWt9GcQ0kgM8ow6iUdygIgIVazIbyfO/ge9CEytt8OPi5EOm08hsVt7bw0Xd/eSlYPxF1z3zX+lVLW13P9un0gkevLOonE5P+UYsFyMppzKIn32etrYXvZ2bdSRlAWAAl5/7bckndOs+3/NNWz/f7VVpru4UZra1W32tP9cA5lFaHbqBM2yoxAItJxTywWLCejOYeS8LYX2KWMekmHsgBIyG8yYxpupK1squ+ubdw1j7p+juuqera3MqCtw7o8aEpbw9VKuR4S+TSVKSqGoVbSoClLZliJdOH8H1gsWN5Gcw4lgcwow6iXdCgLgIRskRlqQov7rSFMriaxXgYlbm/koQ/o9e0DU8D74V7O0KN5vJNSfXRu5N8dBDVPAZcGTY2JiPk/pViwvI3mHEoCmVGGUS/psG4GfvwJ/fk2G/Os7l3NO6rqIpaoWLA05mvOc6sH8OOP8efbXmBrjHpJ9yO5ABKSbbORapbzxWUGk7+vZTw1hJLItr3AVhn1kg5lAZAQmg0MS2c051AStBdlGPWSDmUBkBCaDQxLZzTnUBK0F2UY9ZIOZQGQkHybjUuPbjor85cutBKN5hxKIt/2Altj1Es6lAVAQlY3G+YScsM8gV+iW9++KSJm9yW5vkP8eHR3GY3rFhr2g9GcQ0kgM8ow6iUdygIgIVtkhrnk9q8zkg+WGdWznl4Ie6TMuG6hYT8YzTmUxPvstauxvezsWykjKAuAhLxD62Y860opper20wwfFpa77pqH6hmcQwpKX/9uoI/1h5TV0MkwL09RN6+qejW1sbvWLTAukTFs82yto3/9S220T1X/zf+6yeq5qp/OWuP90t3yahtDZqaU26eyFhrPrNBOD8TLNppzAICcYd0M/PgT+kMyo49K+0C5G1dssJ+X/9VTVK2tNNfWz1aP8udVukdzY/3vp6m0x/z6U/95uW5tQb1xUTwtmNaO/vXLjOm1sPPSe2ayRq6Gb/vluoe1vX1rh1sDoqYsZVtoWGLzyYzc6gH8+PHjv6efR0EACbFkxvTg3HiKb60C7ouYh8fqTsg+bCYu0S1G9s7uwgLkZqfBcIilJ/TiubjJmkdv60fTjRqglxP9X2slb2dklKcosio0LK3RmwEAkDPU0QAJCfVmxMgMwTnGzW7E3GqP6n3puxnwHdrdRT96+KT63onGk6y7Zdv3YHya6tm2T3vwmCgzqlfb93L4Ti2jQsNSGTIDACBnqKMBEvKbzBgHDo1f1cNLnD5NZU5IcAZcdc1Dm0ExzXkwx/9YEbM2Tkncxjh6Fxo0NWVeickaufr37V519ejfT9U1z7p+Np127vqgKTvD/9paVc3HPW4uhYYlNmQGAEDOUEcDJGSLzJhH4FhP2ee5yENsbY1E+v5rxy3mQVmj09pl6GpwM6MPHxI6BMakvosyY5q9II1K0nM1DV7SdzH2ciZgGFM7VFU/cy00LK0hMwAAcoY6GiAhXpnxuxHOUmi3N2QGAEDOUEcDJASZkZdRaGUZMgMAIGeoowESklBmYNjtDZkBAJAzrJuBH39CPzIDw9KZT2bkVg/gx48f/z39PAoCSMhBMiOrsUAnZoZyuJnRmwEAkDPU0QAJ2Sgz2uf8PqR+aYiwxUS05kJyxnLa24I83747hteUAxY0ZAYAQM5QRwMkZIPM6JqHvv5dWwcX3u4tMrw23xVrr2Wx1hKH15QDtmjIDACAnKGOBkiIV2Z0r6p61lX/QP3TVNOT9XHxO3P7rnnY60JoK0L06zk0tfOEXt8luFT2nP7gHPKm9DXyjAwMeVbz2herM9PUal4Tw1qC457lgK00ZAYAQM5QRwMkJCQz+kCzfarpw7A8XzDibJ+q/hNWp54C2WGFu79aW2bbWV/837ffYF4TcFqr7tnqQX/7tCPgIQN6vL4pM8raxVnp74blgK00ZAYAQM5QRwMkxJIZ07PwecFpdxVw3wic8TG5sNS0u0K2OQNBTZH0nKYWXg/P4M0IeN5sfO6uZ8DN+U+Zkc6XcsCWDJkBAJAz1NEACQn1ZshB6hjOWhtPTlGNiBGtFb8GBwuNkbQb+/7V6tG0TgbED5szIxjln49LJgAAIABJREFUgC0bMgMAIGdYNwM//oT+9TJDmvqsBaNd81DVq3PH51gR7fevtkbjOJF03c7hb918vt9/w4yIVttyGsplZ0Af1/RjZsS5GbcsB2yl+WRGbvUAfvz48d/Tz6MggIRskBlfY57x8CLXdpxJbIy2Mmcbd27K1viiOVHrkfw8cblqPuYrX6e5Ck4GRqe1S2xmlmTGHcsBW2lvejMAADKGOhogIe8rrgJO7Es5XMSQGQAAOUMdDZAQZMaFjXLI3pAZAAA5Qx0NkJBLygwMu4ghMwAAcoY6GiAhyAwMS2fIDACAnKGOBkgIMgPD0hkyAwAgZ6ijARKCzMCwdIbMAADIGdbNuKP/rZRup+enSL9WvOdHYxhWpPlkRj71AH78+PHf2c+joHshBr6u2IANiOLNcmIYtq+d+6sHAIAA1NF3YWySQ88FabPjiQx3wmWOYdgvRpUFAJAz1NG3ID7Ypdn2se0ZKjIDw9IZ9RUAQM5QR5fP2kiXlrtnl7EZyAwMS2dUVgAAOUMdXT7IjEhSjPlGZmBYOrttZQUAcAmoowtnW5h7h8b7mLmkyAwMS2d3qKkAAK4LdXThFCYzfsnYKS+oOVxmfJpKKaWUejTd+VEghiW1bGsqAAD4sm5G2f5fYlyr/T79vCxtEJNOjK5Inf+Nl6B7VdWrW79l1zxU/ff9/vu2TxWZAoZd1s76XePHjx8//hg/j4JKZkeZcS6RmcnwhfreSxAWEhtlxl89d2J8mkrV7fmBIIals0x+5gAAIEIdXTIFyIywYMhQV1hEyoyuefRDnVT16uaBT6pqPvNXvYToXlX1amql1LM1t7R6MLrmUTWf0wNBDEtnef7qAQCghzq6ZK4uM6w8XHEB4CiZ0b0q9Wy//77ff239bL+e3oz2qeq/b/eqlNZNoW1p64p++7MDQQxLZ5eoBAAAbgt1dMlcV2a4iuKi8YRzCf5qZVM1r1r1vRPjZrYImTZ9dZYCCciM+JFXGHZNu2i1AABwE6ijC+eKb5q6tK6wWDM3428WG9O33auaplv0zniZQW8GVrqVUUsAAJQKdXThXFFmTJTYmzGa2V9RD/Lg01TjBAxlj57qmofcmzF1gzA3A7uZXbRaAAC4CdTR5bNWaWTbcl9RbMT1ZswjqSZh0NbDv+34XVU/hd4MbUveNIXdzS5XIQAA3ArWzSjfv4vMyPC8LuH/ZXrMBmPdDOxW5pMZudUD+PHjx39PP4+CbkF8sMvTwX05WGawCjh2K6O+AgDIGerouzCOOAo12LTZu3O4zMCwGxlVFgBAzlBH3wtRbCAw0oHMwLB0RsUFAJAz1NF3pIA3OF2FA2UGw6Ww2xnVFwBAzlBHAyRko8xYv7Iek7+xGxoyAwAgZ6ijARKyZnm+6G8F41W22B0NmQEAkDPU0QAJiZQZXfMYV8d4dfPwJ1U1n2/3Gv+bFux71qNrkBMszIfd0pAZAAA5w7oZ+PEn9EeuAj6t5N3W1uLff/WoJYZhUd2rmjou2mevPWxd0T6HAVQYVrSxbgZ+/Pjx5+znURBAQhyZMS/4PVE1r3rqrOhtkhmuGrGXD380nSMz1k/twLArGr0ZAAA5Qx0NkJA1czP+amNk1A8yg94M7B6GzAAAyBnqaFhJ11RKqarpzs7IJYgcNFUPIuHTVI+m04dRSYOmph2nKRnMzcBuacgMAICcoY6+Kt0wTbhuv99vWwcj/7aettzrwMiMOOJ6M+aRVJM86K+ZPAV8Hm81jbPiTVPYHQ2ZAQCQM9TRV2WUGapukRn5sv/yfJ55F6ybgd3QkBkAADlDHX1V+mi/rmtVt4bMaLU5xlXTmQ6lqqpy+0C6ptI/6XtruqKtlapbTWYMKSM5/BwmM1gFHLuhITMAAHKGOvqqDDKjbev+Tx/tz3pBVxFGb8a0yaAo6nZ2aRvOHwddUQ1bG6pjtz6SUtlfZmAYNhoyAwAgZ1g346r+UWZ821rV9aAo9L6Igf/81x401dZKqf/89/+aStV1PQmGsVNk3G76Z0j0P61+4F51VM3/nV0OmfuRGRiWznwyI7d6AD9+/Pjv6edR0FWZZMY0KGqSGc4gJqvfoa2VqppmVBhVXVd6SrLMmBIdVMfQu8GAqTCnyYzA0hn9V8YGn6ZS89SOYc5PoetvrD2p9sk4tGyN3gwAgJyhjr4qs8zQp0gMH62RTPbwJm2Hsf+jlwuhQVOmzJi7ThAaIfKQGZ+mUkpff8OUGfP08emNVdY2v+gN49VY6eN1Pc9Gv9645MiGk2JWfa6GzAAAyBnq6KuiyYzv+PJTbcb2SO/UfLNw0OWE3VehnARdmWG9VBckvDIjdUeBta5f9ayrMcS3ZYb2Mtx5vQ4zkR9lhrXCYNLQczHPW06KdwRnasgMAICcoY4GSEi0zJiXzqjbf13zMB7/d6+qejX1vIG7i/bwXuuO+P77jqv1tfW4KIclM+ZH9X/mO8mmbaZ3WFnreFh5m5b1MLss7BVCRplhpWNlwBrWJfRRDHvNZWVltX7aKsI48TUnxYqHuRoyAwAgZ6ijARISJzP8D8vb57Dy96QuBlVg7WKG70aMPq4sPskJcwMjgLae9AsP/qUDKS0nYZlhSBozHf2M3Nkjw2fx6IOnrUeds3rQ1NJJTRfi7KgaswyZAQCQM9TRAAlxZIbZYxB47h5+rm91hvhC6q8VTAvzLtbJjMCBfGadiy/DIaVkRP/OXkpFDvT65aSKnA1/fUNmAADkDHU0QEKiejMEzeCbR+GXGZ6wWBt/pQ0Q+kVmrI2/jWje6sHQt4yTGfKxNLGxTWYsnhS9GVkaMgMAIGdYNwM//oT+LYOmzGkVnlkK7qApc5CPuFk/Zsk7NyMoMwYN4DuQ9m940JQvHXHQlDY1Qg2Dpuyj14NGGseGTXvFyIzIk2JuRq7mkxm51QP48ePHf08/j4IAEhInM4xxO3X7b1wKZRxPtTAZ2poCrgQtMdhfrR5NG3zTlCgzvv/GN5J95AMZJxKYAt73rkx6wBxM5Ximrph5XJm9zTwIbZIBQ1YXpoCvOSneNJWr0ZsBAJAz1NEACfHKjJxMWzcjD8ttIgTrZuRqyAwAgJyhjgZIyCVkhrEKeA6WlcxgFfCMDZkBAJAz1NGXgQb1ilxEZmDYJY1aEQAgZ6ijrwGt6UVBZmBYOqNiBADIGeroC0BTel1OkxmBcUfC7PD0g6b2GgfFECZMM+pGAICcoY4GSEgeMuPTVMp+a6312txeY+wkBvTFOoYXQIkpxx/OeituPjM3sFMNmQEAkDOsm4Eff0J/7Attdzf7HbjPuvIt+Se90PYHG9e46P/9q/U1AXc5HV4vi43Guhn48ePHn7OfR0GZwlO6MoiWGfP6D3Wr9waMS0xUr6aeN3B30VZ+mHeZOiuq5tPWZseCsDzfpxmTqJqPnYevb6ULawiTJlr0Mx2kjpZg+5RWzJj21c/OyNiXxfKw0agnAQByhjo6O95K0XYWQ5zM8D+eb5+q/uuj8GGDQRW4q4APC2Y7nRXj8tiTnDA3MEJ2sc+hz4O+VLaxRGBoMb45b9qWc3fHsLGTebdArGSHLJ0f5mLnGlUlAEDOUEcDJMSRGfND+rljQFyv2rcotbi8t769UqoP641Q/t/czxApMxbzIEZ+AZlhpPxs9XPxZd6XbFYLa2DnGTIDACBnqKMBEhLVmyFoBt88Cr/M8MTl+mxspU+TCMsMNw/6xOtQlB8YNOWXGWFR4XrozcC+/77IDACAvKGOBkjIlkFT1jug5J4Ed9CUOMrI3KyXCt65GY4A0PMgzhQX5mYsTwF3XmzlZF4cNDUNrGJuBjYaMgMAIGeoo8+HyRgFEyczjBFKdfuvHUdWDeOpxK4Pcxd5jJMw0fzRtP43TX2HQ/dTxu0xXf2k7ekQX1lmfM0ulHk6h7Wv51ycSeFDClPGeNMUNhk1JwBAzlBHnwzNZNl4ZUZONncvRNpeY5a2rYDBuhnYaNSfAAA5w7oZ+PEn9F9CZkSuAt7Os9fn8UtbrZ8Kv349b1YBxzTzyYzc6gH8+PHjv6efR0EACbmIzMCwSxq9GQAAOUMdfQI0jfcBmYFh6Yy6FAAgZ6ijj4Z28VbsIDMW3u4aNd4JCxkDsS5rVKcAADmTXR3dv3YJs+zsywIbSS0zVs/e3jcn1rfT3I0DovaFFfo+jbnmnxreUuXZPjyt/NKnVrRRNwIA5Ex2dfQOYVlxhtK4Lt77OX4d65DMcNbCS2qLMsNdf+OczPzV3pUEP00lZiz4ktxrn1rJRsUIAJAz2dXRyAxPU0qDekkiZYa20IS2BN78sNqzuMT0DL57VdWrqZWaFtezH73/1fq+CwtxDHvNuRpX+pufnbsrZhhn9FdPsfgBmZkLtvdr0bYQsv/VSrl9F/OSf8WdWsFGrQgAkDPZ1dHIDE9TSpt6SVb3ZgxLUmgLY7tLZY/7mpHx9DDejIOttcDdZfvm9M29tMf2bW0vDb4Qi89jkA7JzOBXwogmXzn3sb4+3mxaDKS8UyvXqBIBAHImu3UzkBmepnShWc3tOuLvce5n7Wm30h5ai2t497t4A1ZTZhgCQOfZiqGtm76w1+Ljc81863wfkRlNg7m5CuS5fSpbKpR4auUa9SF+/Pjx5+zP7lGQKzOU5lFBERL41v0qnJS+weK+YlLx2Y5rSpdbVsgQr2z29QwEwtN4mSGMpYkIf+WYVQuCI+dm6LMXDszMbr0Z5Z1auUZlCACQM9nV0Ztlhq4KdKwNlIdAgot5WNzdt1dkZtwyoXG9CrEyQ39z1DC0Rhu4L3vsuRn+59/SYJ4xINbSN/fqXvUwN+DTVI+mc4Ls8MiiYctDMmMmnnZuxgVPrWCjJgQAyJns6uhtMmNDd8GquH+K/kU9sFbVrD0XMVSlfb0EUTJjeFytlFJV/awmCbHombSHFXG6g3wczzTteE7N3mYe3zXNRe7zGTEFvE9/CpoTZ8Yu3t/eNFXaqZVsVIMAADmTXR39djoBptBcmejbWB/Cphx8m4WdU65cj5XtwO4xx317tqSJzR/ftdvLVq+bER74dLDlk5nwuhmXPrWijToQACBnsquj3bAsUlGIUsSSKL5kfcdyD+fbIJDVryRIfBkQ/YFQlVY2c1LLjNWrgGcV/maSmRSrgGdyaqUbFSAAQM5kV0dvkxlip4QY1os6xHeIyO4InwjxHU7Mni/b33F5voCdfdHAS3qZgWH3NWo/AICcya6OFmWG2yOx2FfgegISxW29RI3xdWRDIA8+9RI+bsBPQ3tFkBkYls6o/QAAcib3dTMCXQ1We7NKZvjUgr6lT2YEPls9GOKxNvRmxDS0uV1H/D0rZMY4w1teJEE078iclSOpbmsphkthB5pPZuRWD+DHjx//Pf3ZPQoSezP0D5F9F64nsjfD3SwsLXxJLaojejPuQLTM8LwzajLR79l49bzwXyx+zb4DAvqIGRHzq5/69zjtPvkbO9Co/QAAcia7OnqVzFg1KmmxN8PXc+LmIeaIYrLWBj5oaIshVmbISyVE7CWEyPMKG0dY5Jp9m89xt8xor4IdSqnPjPYqW+xqRu0HAJAz2dXRPpkhxvRrZYaYVGSvwrRvQA8E8uNuT2/GHYiTGfPKCUopNa4V3YzeujVW/g5t9rXX7GtqNa8tPWw4iRDtuJ6Fxt29jAwMa8YpFbWYhrlIdurMzMXrLGxnZmZemA+7mlH7AQDkTHZ19FuKzmMiciV1FIgbu1uKKfv8gSO6/1o5CZwLDW2RvJ3LPUTGYwzd1oaK0FaPNmWDs6p0Wz9bdzN7NevpOb0Z4o9Bub1ktR3ZO3tZGfi6/RXB9bPnVQXTZ2YsXnGwVltrc1faJ/NYLmrUfgAAOZNdHe2GZRgN7XVx7uchVh6nT3yaypyS4Quy51BbezAvPfI3ZIYhAHSerRi1uwcV9jJ7BuLnZhydmb9ank//V1vdHaxxcVmj9gMAyJns6mhkBg1tSdj3sxbRtrU2vCdWZvTpjOH1KplhR9Jxkb0cf2vxfeTcDH1ixoGZkXoztGP1Rm/GZY3aDwAgZ7Kro5EZNLQlEXs/R8qM7lUPj+E/TfVoWklImHMz/I/2pXFK2nQFNXaeGHtZGegc/RAeNDVseUhmzMSduRmzMTfjukbtBwCQM7mvm4FFNrS5XUf8PTvLDG2e9DDlWuiv8Lwb1x2/5Hjml73WT2fWtVJuBr7/vnq3zMIU8D79SQ8kzoxdyNObpqw3cfGmqQubT2bkVg/gx48f/z392T0KQmbs1dBCDpxyP69eNyOryQkHZ4Z1M65s1H4AADmTXR2NzKChLYmT7ueVq4DfVmawCvjFjdoPACBnsqujkRk0tCXB/Yxh6YzaDwAgZ7KrownLaGhLgvsZw9IZtR8AQM5kV0cTltHQlgT3M4alM2o/AICcya6OJiyjoS0J7mcMS2fUfgAAOZNdHU1YRkNbEtzPGJbOqP0AAHKGdTMub6ybkbOf+xnD0hnrZuDHjx9/zv7sHgURlu3V0EIOcD9jWDqj9gMAyJns6mjCMhrakuB+xrB0Ru0HAJAz2dXRhGU0tCXB/Yxh6YzaDwAgZ7KrownLaGhLgvsZw9IZtR8AQM5kV0cTltHQlgT3M4alM2o/AICcya6OJiyjoS0J7mcMS2fUfgAAOZNdHU1YRkNbEtzPGJbOqP0AAHImx3UzsLV24vXCH/YjMzAsnflkRm71AH78+PHf08+jIICEIDMwLJ3RmwEAkDPU0QAJQWZgWDpDZgAA5Ax1NEBCkBkYls6QGQAAOUMdDZAQZAaGpTNkBgBAzlBHAyQEmYFh6QyZAQCQM9TRAAlBZmBYOkNmAADkDHU0QEKQGRiWzpAZAAA5k926Gfjxl+RHZmBYOmPdDPz48ePP2c+jIICEIDMwLJ3RmwEAkDPU0QCpGNdoPz8aw7AiDZkBAJAz1NEASegDoF5pYBiWyM7+oQMAgBfqaID9Ifq5FlwvAACA3aFxBdgZYtbLwSUDAADYHRpXgN1gFMdF4aoBAADsDo0rwD4Qql4Xrh0AAMDusG4Gfvw7+H1xam75xC/6p8uXSX7w48ePHz/+AvxybAQA8fAs/OpwBQEAAHaHxhXgJ4hQC4CLCAAAsDs0rgDbITwtA64jAADA7tC4AmyE2LQYuJQAAAC7Q+MKsAUC05LgagIAAOwOjSvAaohKC4MLCgAAsDs0rgDrICQtD64pAADA7qg837OLH3+eftbHKNLPuhn48ePHjx//7n45ZgIAi7dSPPMuFa4sAADA7tC4AixDGFo2XF8AAIDdoXEFWIAYtHi4xAAAALtD4woQggD0DnCVAQAAdofGFcAL0edN4EIDAADsDo0rgAyh533gWgMAAOwOjSuAAHHnreByAwAA7I7K8z27+PGf6H8rfhf38rNuBn78+PHjx7+7X4nfAdwWHmzfEC46AADA7tC4AswQbt4TrjsAAMDu0LgCDBBr3hYuPQAAwO7QuAJ830oRaN4Zrj4AAMDu0LjC3SHEBO4BAACA3aFxhVtDfAlfbgMAAIAE0LjCfSG4hB7uBAAAgN1hfQD8N/X3kWU++cF/ll/XGDnkBz9+/Pjx4y/Dr8TvAMqGp9cwwc0AAACQAtpXuB2ElaDD/QAAAJAC2lcoGTeCJKYEC24JAACAFNC+QslYESQBJbhwVwAAAKSA9hWKBY0BMXBjAAAApID2FYpFDx8JJcEH9wYAAEAKaF+hTKbY8a0UcSQE4PYAAABIgcrzPbv48f/o72PHKYI8PT/4s/WzbgZ+/Pjx48efwq/E7wAujaUxLD+ADncFAABACmhfoUD0gVL9Z4ZOgQ9uDAAAgBTQvkJp6LqCCBIW4SYBAABIAe1r4VgxN7avnX15YQe4jgAAACmgfS2ct1Lf7z8shRGelgHXEQAAIAW0r4WDzEBmQBiuIwAAQApoXwsHmYHMgDBcRwAAgBSoPN+zi38vPzLjGJmR23XHH+/nOuLHjx8/fvwp/DzGKxxkxjEyA64L1xEAACAFtK+Fk4vM6F6VUqp6dafnZLL2qZRS9R8y44bo147rCAAAkALa18KxZEbXPJRSSj3bMc6umo8njP6rpy0TyYw+0J8Yv+0z6c9YpC3lH5lxY3wyg2sKAACwF7SpheORGapus5EZfaDfb7DX4ZAZsMR0+dwPAAAA8Ds0q4Ujyoy6fqr6z5AZesdC9eq+/9pa72h4VJXbB/JpqmHjSb3MCU66on0q9Ww1mTGkPHw1B/pzJ4bm17NRNZ9RjZgdIKazz4CZ/znn8479v9WjMvtS3KKwzwWZUQTIDAAAgKTQrBaOLDPav1o920kwdK/K1BtV87F6A7rmodSj6UZFUf/NezmqoG6n0Pwx9FEYkfooLaz+hOnf8YMwekqTK9LYqk9TqT6fdm/GICp6LfFp6klmzMpnyrZdFNa5IDNKob+C+l8AAADYC1rWwvHIjH9trep6CKP1voiB+k8M0+v201Sqrp+TYOiTGmJ0XSpYg6D0SN3qN1iSGXofhTH4StvdPAVBZhiZdI4+fSsXhWdAF4Hp1UFmAAAApIN1Mwr3+2TGNDRokhnOJA1rbsNfrVTVvGr1aLq/Wj3q+tF/G5IZk6IYIvV+8JU5Uis4aMoYwmQlK3V6tPUOMsMuCs9rsvTANLfrjj/G78qMPPOJHz9+/PjxX9HPA7zC8cqMIQrXwnr7ab09hXqeUzGMTRJ6FZxBU6bMqF7dqDeaTpoC7iRoBPqmzJiO1X+Yp4usGjRlZVssigiZARflrVRvZ2cEAACgNGhcC8cvM/ToXJ5FrY0gerZfbVaGtW94CrhnToUaJ4doR7UHUxlDmKTZ3qMU+Rvne/e9Jb3MsPMvTwG3ZIZYFMiMckFmAAAAJILGtXAsmXF5y2mZP2LTMuA6AgAApID2tXCQGciMHJg6DbBVdvZ1AwAA2A7NWOGUJjNyMqLAeLgPucEAAOBu0IwVDuEdUWAOcB9ygwEAwN2gGSscwjuiwBzgPuQGAwCAu8G6GYX7Ce+OiQJzu+65+bkPt91guV1H/Pjx48ePP97P07LCIbxLGgWefXkvA/chNxgAANwNmrHCOf1VOWXb2Zf3MuwpM9zVG/O0n/PJDQYAAJeGZqxweIqczogC45Huw2lRRbUuHI8P3z3rP/brNk6LS241c5n5X/LJDQYAACVCM1Y4yIx0RhQYj3Mf9jH6sF77OlsrM/oth8Xd/apgtSEzAAAAQtCMFQ4yI50RBcZj3Ydyf8KgBMa+h+lbvVOienX9v9WjMvso7M2+dqA/H1Tzt1qXStV8rDwM6UgZa42+mGf7Sz6nRSfbp65buMEAAODS0IwVDjIjnREFxmPdh32MXre+sv001djXMQTrfYz+aeopfH91ejrdq5qUSft05cTkV/Xf9EFQO9oy85IW0jJm9Wb8ks/hoA+rv4UbDAAALg3NWOEgM9IZUWA8kTKjj+xHHk0nben0RdSttaOy5IS9oykz9D4KXWbou7sZs2TGT/n0DOjiBgMAgEvDe9kL9yMz0tmbdTOi/e+IQVO6s623yAx7FFbEoCljCNMU8ZsyQ8zYLzJDHi02jarSbrDcriN+/Pjx48cf7+dpWeEgM9IZD5vjce5DYQp4H4tXzSdq0JQZvo9qwewQcKeAS3M25m9NmTElLmcsctBUTD79MuPs6wYAALAdmrHCQWakM6LAeKT70H2h7eR5VHM075labYXvX2mitueFtuKgKXG29yhF5Ixpu/ungMfkE5kBAAAlQjNWOO+zF7Ar286+vJfhfRW564n40bEAAABroRkrnMuEdxc0osB4LnMfIjMAAAB2gmascC4T3l3QiALj4T7kBgMAgLtBM1Y4hHdEgTnAfcgNBgAAd4NmrHAI74gCc4D7kBsMAADuBu9lL9xPeHdMFJjbdc/Nz3247QbL7Trix48fP3788X6elhUO4V3SKPDsy3sZuA+5wQAA4G7QjBUO4R1RYA6c/urhi9rZ1w0AAGA7NGOFg8xAZuQA9yE3GAAA3A2ascIhvCMKzAHuQ24wAAC4GzRjhXP6qI+y7ezLexmQGcgMAAC4GzRjsBFiIIgHmYHMAACAu0EzBlsgAIJVIDOQGQAAcDd4Lzv+1f4360XgZ92MQ2RGbtcRP378+PHjj/fztAwAkoPM2CYzzr5uAAAA26EZA4DkIDOQGQAAcDdoxmAZ3qoEP3L6O8EuamdfNwAAgO3QjMECxDrwO/Rm0JsBAAB3g2YMAJKDzEBmAADA3aAZA4DkIDOQGQAAcDdoxkCA+Ab2BZmBzAAAgLvBe9nx234xuMkwn/gv5EdmbJMZuV1H/Pjx48ePP97P0zIw4AEqpACZsU1mnH3dAAAAtkMzBgDJQWYgMwAA4G7QjAFAcpAZyAwAALgbNGN3h1XA4ACQGcgMAAC4GzRjt4Y4Bo7h9OW0L2pnXzcAAIDt0IwBAAwQ2QMAAOwFbSoAwAAyAwAAYC94L/vt/H0glU9+8OPPx++TGbnlEz9+/Pjx48/fL7epUCo8rAUAAACAAyDovBFoDAAAAAA4BuJOAAAAAADYmcvIjNPfLIntZWffSgAhuEUBAAB24TIN6pvlvYowlAZkDvcnAADALlymQUVmlGH9dSSSg5zh/gQAAPidy7SmyIwybLqORHIAAAAABaPyfM+uCzKjDNOvo640crvf8OPHjx8/fvz48f/iv8wT5d9lhvKnYH3V/+tuP/l1dgm+p3R8B92279qkFjf+/Xyt60ifBgAAAECRXCbIO15mfB1d4W68u8xwD7qoasT8iLu4pxlI/BiZgdKADOGeBAAA+J3LtKY/ygxfB4XoDMfom2XG2pg+Jns+KRKfW19ODpMZKA3IEO5JAACAH7lMU/qLzAg/0dc/xHQaBNTC2iyFkxL1Q2Tov6PMCOuZXWQGSgNygxsSAADgRy7TlG6WGWLc7Iby4cj7R1GxKrgPZ8Z3CuI5Rialn91icYVT2ywzUBoAAAAAJXGZwG6DzLBCdl9jZtEUAAAJjElEQVRoHqkrfE/3t0mLgACYwv1wB4KrTMREwjIjsEs6mRG2s280AAAAANiBy0R1b78SCIfji2GxKz/EcDysTET14jtWZCi/KBJ8GiNwiEVdkVpmLIqQs280AAAAANiBG62bEQjTRQnhyo+ABtgmMwIeK28+8SOmECkzwukEshHQcrvLjNzuQ/z38et3Yw75wY8fP378+K/lt6O6bEkkM3xbhp/6L4b+8dkIy4zFHX3br5IZ4dTozYB7wt0IAADwC5dpR5PKDFFXhKPqQLfAYh7C4mSxN8OXW3HfGHkQfy4ppIVuBHaQD9yNAAAAv3CZdjSRzHB7JHQlsFZmxOchkNqUpcgjLnaPbDsRZAYAAAAAbOYyUd0Bg6bcXgJx6JSvk2FVBnzdDl+PFPEdKOAPnLhP7fiyFF+GPxoyAwAAAKAMLhPV/S4zsPwNmQEAAABQBpeJ6pAZdzBkBmQFNyQAAMBmLtOIIjPuYER1kBXckAAAAJu59roZ4dnMka9UEjeImUK9dvaCOK9DnOMRnlkRc6arTtaXt8W9DpAZud2H+G/ln27ITPKDHz9+/PjxX8hvR3XZ4sqMGBWh/PO2186cdtVFeGq1e6BwgB6QGWKGVykN37lvOJcYKbKjzAAAAACAK3KZqO7tRNVi0BwOf8VgelUYHdhgMeYObyBG/Ivpbwv9w6Ji8UPMySIzAAAAAO7MZaI6V2ZYn8NBcGQsvipGF48YSCEgS6avLMkknl1ktsM5ET164Vg58YHMAAAAAACXy0R1YZmhpG99/kDMre/ixtmLisIK1q1wPPLvYrbdbcLn5aoCt3xWfQhrGGQGlAT3JAAAwDYu04KGZUb4w+KTeCsiD0iIgMxw5cFiPmOC+MX8uCe4QTkEyse3DTID7gD3JAAAwDYu04K6MiMgGGIkgRvjBjRGQKvou+wiM6yw3idjFj9v+xDObWojpIMM4bYEAADYwGWaT1dmBD7HPK0Xo+qwzIgPzRfzFvhrqRdfnlPIDFc4iRnzlSEyAwAAAAB6rrpuhi/IjpQEvn9XPd3fIDMC2iCsbXx5dnVRWGItygw3zcgyTCQzcrsP7+x/K4Xdx06/3/Djx48f/9X9cluSIe+fZYZFTOjvC+s3y4xAhG1tuXg4cZuAKvBto0xp4SYr5iF8LjvKDMiHd5qLjmVoAaUBAAAQyWUaEldmuJpB/1bf7OuPxX07uukE9goku1ZmuLLHd5q+iH+tzFjMuU/eJApuzr7RwAsy4z7WX2t+jwAA8AuXaUVcmeH7vPj03RcoB/zWNr7oX9xS/NY9bsyhY/K2uH1AsbjbWILN9++uwQ1kCjLjPjZda36SAACwmcs0IYQ4dzBimpzhN3gf0681v0oAANjGZdoPQpw7GAFNzvz+G1zb/RUzqG/Dvr/karFTMfzV5g7A+A7Y8CEi82Nda36YAACwgcs0HsiMOxjRTM6cKDOmz+KoxfgBh4tjHcVDLJ6C77wWNYDvdHyZXDzrcCHHaxL3WvPbBACAtVym5UBm3MEIZXLmx9/gFCi7/lUxve+rmJBdaXojfBRfTuJlhnheiyJBTNM6+qL88J17fH7eUvbe/DwBAGANV1o3A7uDZXK/4Xf97x9khop75ZqKeGavHCJ1yL4yw82GlR/3EJGFEDii+HfxrDfkx3et3V9oPvcnfvz48ePPzc/TKQCIYrPM8EXMq4J731eBSDocqS8mpcuG8CmIn32ZEU8toFKsbPi2D6S5Kj9hmRFQGgAAABY0GAAQxQaZ4YuD9a8Cz9TFB/CrQm1fImGZEdhls8xY/BDp9+U58kQis/Fe2esIAADgQmsBAFG8nUg3TEwcvCGUjwy4w4rC+rCoK7bJjIAQWiUzfGnqKbtl7v4bk58YQ2YAAEAMtBYAEMV7TSQakBOLMiPgEUPtQGobZEY4nXDEb8X9AR0SLzN8wiCQVTFLkflBZgAAwF7QWgBAFOlkhi/a9smMxR1926+SGeHUwlF7YAOfigioFGtHd+NVJRPOT4whMwAAIAZaCwCIIp3M8MX6vvDdF5fHhP6+UD4y8t7mDMuMmLLSi2it4tp8sj5DZgAAQAy0FgAQRWqZsRgZi2pkQ5geE3lHJht2+rodYsJ6Vz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RequestQueue是一个请求调度队列,里面包含多个NetworkDispatcher调度器与一个CacheDispatcher调度器
主要属性:
mSequenceGenerator: 请求序号生成器
mWaitingRequests: Staging area for requests that already have a duplicate request in flight. 相当于一个等待队列,根据请求url来将以前发起过的请求先加入这个队列中。避免同样的请求多次发送。
mCurrentRequests: 正在被请求队列处理的请求集合
mCacheQueue: 请求缓存队列,请求可以被缓存也可以不缓存,保存可以缓存的请求
mNetworkQueue: 需要进行网络访问的请求队列
mCache: 可以保存与获取请求响应的缓存,把请求响应保存在disk中
mNetwork: 真正执行Http请求的网络接口
mDelivery: 将请求响应进行解析并交付给请求发起者
mDispatchers: 网络请求调度器,每一个调度器都是一个线程
mCacheDispatcher: 缓存调度器
主要方法:
start(),启动所有调度器线程
/**
* Starts the dispatchers in this queue.
*/
public void start() {
stop(); // Make sure any currently running dispatchers are stopped.
// Create the cache dispatcher and start it.
mCacheDispatcher = new CacheDispatcher(mCacheQueue, mNetworkQueue, mCache, mDelivery);
mCacheDispatcher.start(); // Create network dispatchers (and corresponding threads) up to the pool size.
for (int i = ; i < mDispatchers.length; i++) {
NetworkDispatcher networkDispatcher = new NetworkDispatcher(mNetworkQueue, mNetwork,
mCache, mDelivery);
mDispatchers[i] = networkDispatcher;
networkDispatcher.start();
}
}
stop()终止所有调度器线程
/**
* Stops the cache and network dispatchers.
*/
public void stop() {
if (mCacheDispatcher != null) {
mCacheDispatcher.quit();
}
for (int i = ; i < mDispatchers.length; i++) {
if (mDispatchers[i] != null) {
mDispatchers[i].quit();
}
}
}
cancellAll(tag) 取消具有tag标识的所有请求
/**
* Cancels all requests in this queue with the given tag. Tag must be non-null
* and equality is by identity.
*/
public void cancelAll(final Object tag) {
if (tag == null) {
throw new IllegalArgumentException("Cannot cancelAll with a null tag");
}
cancelAll(new RequestFilter() {
@Override
public boolean apply(Request<?> request) {
return request.getTag() == tag;
}
});
}
add(Request),将一个请求加入请求队列中。中间有一个判断,如果请求不应被缓存,则只加入mNetworkQueue中,否则根据请求的cacheKey是否已经存在于mWaitingRequests将请求加入mWaitingRequests或mCacheQueue中(同时将cacheKey存入mWaitingRequests)。cacheKey就是请求的Url。
/**
* Adds a Request to the dispatch queue.
* @param request The request to service
* @return The passed-in request
*/
public <T> Request<T> add(Request<T> request) {
// Tag the request as belonging to this queue and add it to the set of current requests.
request.setRequestQueue(this);
synchronized (mCurrentRequests) {
mCurrentRequests.add(request);
} // Process requests in the order they are added.
request.setSequence(getSequenceNumber());
request.addMarker("add-to-queue"); // If the request is uncacheable, skip the cache queue and go straight to the network.
18 if (!request.shouldCache()) { //如果请求不应该被缓存,则只加入网络请求队列中
19 mNetworkQueue.add(request);
20 return request;
21 } // Insert request into stage if there's already a request with the same cache key in flight.
synchronized (mWaitingRequests) {
String cacheKey = request.getCacheKey();
if (mWaitingRequests.containsKey(cacheKey)) {
// There is already a request in flight. Queue up.
Queue<Request<?>> stagedRequests = mWaitingRequests.get(cacheKey);
if (stagedRequests == null) {
stagedRequests = new LinkedList<Request<?>>();
}
stagedRequests.add(request);
mWaitingRequests.put(cacheKey, stagedRequests);
if (VolleyLog.DEBUG) {
VolleyLog.v("Request for cacheKey=%s is in flight, putting on hold.", cacheKey);
}
} else {
// Insert 'null' queue for this cacheKey, indicating there is now a request in
// flight.
mWaitingRequests.put(cacheKey, null);
mCacheQueue.add(request);
}
return request;
}
}
finish(request), 表示已处理请求request,如果请求被缓存,则清除waitingRequests中的记录,并将其加入mCacheQueue中。
/**
* Called from {@link Request#finish(String)}, indicating that processing of the given request
* has finished.
*
* <p>Releases waiting requests for <code>request.getCacheKey()</code> if
* <code>request.shouldCache()</code>.</p>
*/
void finish(Request<?> request) {
// Remove from the set of requests currently being processed.
synchronized (mCurrentRequests) {
mCurrentRequests.remove(request);
} if (request.shouldCache()) {
synchronized (mWaitingRequests) {
String cacheKey = request.getCacheKey();
Queue<Request<?>> waitingRequests = mWaitingRequests.remove(cacheKey);
if (waitingRequests != null) {
if (VolleyLog.DEBUG) {
VolleyLog.v("Releasing %d waiting requests for cacheKey=%s.",
waitingRequests.size(), cacheKey);
}
// Process all queued up requests. They won't be considered as in flight, but
// that's not a problem as the cache has been primed by 'request'.
mCacheQueue.addAll(waitingRequests);
}
}
}
}
因为文章是边看源码边记录的,所以一开始完全根据当前的源代码来理解。读的代码越多,理解可能更深入。看完CacheDispatcher与NetworkDispatcher这两个类,这里梳理一下mCurrentRequests, mWaitingRequests,mCacheQueue,mNetworkQueue,mCache,mDispatchers,mCacheDispatcher之间的关系及他们是怎样共同作业来完成一次请求处理的。
1. 当用户以RequestManager.getRequestQueue().add(request)的方式向请求队列中添加一个请求时,即调用RequestQueue.add(request)方法(上面已列出源码), 这个方法首先会把这个request加入mCurrentRequests中,表示这是一个正在被处理的请求。
2. 然后会判断该请求是否可被缓存(通过Request的mShouldCache属性,这个属性默认为true),如果不能,则直接加入mNetworkQueue,由mDispatchers中的某个调度器线程来处理,如果可被缓存(默认都是可被缓存的),则根据Request的cacheKey属性(值为请求的Url)判断请求是否存在于mWaitingRequests这个Map中,如果已经加入,说明之前已经发起过这个请求,那就先将这个请求放入等待队列中,因为请求结果可被缓存,这样等先前那个请求处理完,再处理等待队列中同样的请求(见上面finish()方法),则可以直接从缓存中拿到请求响应,避免了同样的请求多次发送。如果cacheKey不存在于mWaitingRequests中,则将cacheKey存进mWaitingRequests中,表示已发起这样的一个请求,再将这个request加入mCacheQueue中进行处理。
3. mCacheQueue队列中的请求时由mCacheDispatcher这个调度器来调度处理的。 mCacheDispatcher是一个对可缓存的请求进行调度处理的线程,在RequestQueue的start()方法中,对它进行了初始化及启动。
mCacheDispatcher = new CacheDispatcher(mCacheQueue, mNetworkQueue, mCache, mDelivery);
mCacheDispatcher.start();
CacheDispatcher的类图:
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WUM76H0JUEewjJCPYQkhHsISQj2ENIRv8BrDypaRloeyAAAAAASUVORK5CYII=" alt="" />
CacheDispatcher的run()方法
@Override
public void run() {
if (DEBUG) VolleyLog.v("start new dispatcher");
Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND); // Make a blocking call to initialize the cache.
mCache.initialize(); while (true) {
try {
// Get a request from the cache triage queue, blocking until
// at least one is available.
final Request<?> request = mCacheQueue.take();
request.addMarker("cache-queue-take"); // If the request has been canceled, don't bother dispatching it.
if (request.isCanceled()) {
request.finish("cache-discard-canceled");
continue;
} // Attempt to retrieve this item from cache.
Cache.Entry entry = mCache.get(request.getCacheKey());
if (entry == null) {
request.addMarker("cache-miss");
// Cache miss; send off to the network dispatcher.
mNetworkQueue.put(request);
continue;
} // If it is completely expired, just send it to the network.
if (entry.isExpired()) {
request.addMarker("cache-hit-expired");
request.setCacheEntry(entry);
mNetworkQueue.put(request);
continue;
} // We have a cache hit; parse its data for delivery back to the request.
request.addMarker("cache-hit");
Response<?> response = request.parseNetworkResponse(
new NetworkResponse(entry.data, entry.responseHeaders));
request.addMarker("cache-hit-parsed"); if (!entry.refreshNeeded()) {
// Completely unexpired cache hit. Just deliver the response.
mDelivery.postResponse(request, response);
} else {
// Soft-expired cache hit. We can deliver the cached response,
// but we need to also send the request to the network for
// refreshing.
request.addMarker("cache-hit-refresh-needed");
request.setCacheEntry(entry); // Mark the response as intermediate.
response.intermediate = true; // Post the intermediate response back to the user and have
// the delivery then forward the request along to the network.
mDelivery.postResponse(request, response, new Runnable() {
@Override
public void run() {
try {
mNetworkQueue.put(request);
} catch (InterruptedException e) {
// Not much we can do about this.
}
}
});
} } catch (InterruptedException e) {
// We may have been interrupted because it was time to quit.
if (mQuit) {
return;
}
continue;
}
}
}
在这个while循环中,会不断地从mCacheQueue队列中去拿请求,如果请求被取消了,则继续拿下一个请求,否则先从mCache中去查是否缓存了该请求的响应结果,如果没有缓存或者缓存已过期,则将请求加入mNetworkQueue队列中来进行一次网络访问,如果存在缓存并且未过期,则从缓存中取出请求响应并进行解析, 如果缓存没有Soft-expired(Cache.Entry中有两个属性ttl与softTtl,通过这两个值跟当前时间比较来判断缓存是否过期或者“软过期” Soft-expired),则直接通过mDelivery将解析好的结果交付给请求发起者,否则表示虽然缓存没有过期,但是需要通过网络来更新请求响应,则在交付结果之后,将请求加入mNetworkQueue队列发起一个新的网络请求。
4. 在3中知道了当某个请求的响应在mCache中没有缓存或者缓存已过期(包括expired与Soft-expired)时,会把请求加入mNetworkQueue队列中发起一次网络请求。mNetworkQueue这个队列中的请求是由多个NetworkDispatcher调度器来调度处理的。在RequestQueue的start()方法中,有初始化及启动
// Create network dispatchers (and corresponding threads) up to the pool size.
for (int i = ; i < mDispatchers.length; i++) {
NetworkDispatcher networkDispatcher = new NetworkDispatcher(mNetworkQueue, mNetwork,
mCache, mDelivery);
mDispatchers[i] = networkDispatcher;
networkDispatcher.start();
}
NetworkDispatcher类:
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NetworkDispatcher的run()方法
@Override
public void run() {
Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
Request<?> request;
while (true) {
try {
// Take a request from the queue.
request = mQueue.take();
} catch (InterruptedException e) {
// We may have been interrupted because it was time to quit.
if (mQuit) {
return;
}
continue;
} try {
request.addMarker("network-queue-take"); // If the request was cancelled already, do not perform the
// network request.
if (request.isCanceled()) {
request.finish("network-discard-cancelled");
continue;
} addTrafficStatsTag(request); // Perform the network request.
NetworkResponse networkResponse = mNetwork.performRequest(request);
request.addMarker("network-http-complete"); // If the server returned 304 AND we delivered a response already,
// we're done -- don't deliver a second identical response.
if (networkResponse.notModified && request.hasHadResponseDelivered()) {
request.finish("not-modified");
continue;
} // Parse the response here on the worker thread.
Response<?> response = request.parseNetworkResponse(networkResponse);
request.addMarker("network-parse-complete"); // Write to cache if applicable.
// TODO: Only update cache metadata instead of entire record for 304s.
if (request.shouldCache() && response.cacheEntry != null) {
mCache.put(request.getCacheKey(), response.cacheEntry);
request.addMarker("network-cache-written");
} // Post the response back.
request.markDelivered();
mDelivery.postResponse(request, response);
} catch (VolleyError volleyError) {
parseAndDeliverNetworkError(request, volleyError);
} catch (Exception e) {
VolleyLog.e(e, "Unhandled exception %s", e.toString());
mDelivery.postError(request, new VolleyError(e));
}
}
}
这个线程会不断地从mNetworkQueue中拿请求,如果请求被取消,则拿下一个,然后通过mNetwork根据情况选择HttpClient或HttpURLConnection(具体怎么选择,后面再说)来进行网络请求,将请求结果进行解析,如果请求可被缓存,则将请求结果进行缓存,最后将结果交付给请求发起者。
其中的addTrafficStatsTag()方法应该是做流量统计用的,request.getTrafficStatsTag()返回的是请求URL中host部分的hashcode
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
private void addTrafficStatsTag(Request<?> request) {
// Tag the request (if API >= 14)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
TrafficStats.setThreadStatsTag(request.getTrafficStatsTag());
}
}
这样,一次完整的request处理就完成了。 这应该是Volley比较核心的东西了。 先到这,余下的东西后续再看。