design patterns – General question on Pairing of Abstract Factory with Bridge

I am trying to get myself familiarized with the design patterns and I am reading through this line on the relationships between different patterns. I cannot get my head around this one though,

You can use Abstract Factory along with Bridge. This pairing is useful when some abstractions defined by Bridge can only work with specific implementations. In this case, Abstract Factory can encapsulate these relations and hide the complexity from the client code.

I cannot understand how this pairing actually works, if anyone could provide some concrete example that would be great!

The link is https://refactoring.guru/design-patterns/bridge

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google play store – Android-9.0 x86 apps keep crashing – no native bridge

So I’m not an expert in Android or in OSes in general although I can make my way around a linux environment, just to add as a pretext.

I recently installed Android 9 x86 on a Linx 1010B tablet (intel processor), and I have had many problems launching certain apps which just crash quickly after launching. I have installed and re-installed Android 7 and 8 x86 multiple times and it doesn’t matter which version I use, I just have trouble using some apps. I also tend to have a problem installing apps (after about 8 apps installed, play store gets stuck on ‘downloading’, ‘installing’ or ‘95.99%’.

So I did some reading and found it may be to do with something to do with ARM (still not entirely sure what it is), so I decided to enable it, but when I enable the native bridge on my tablet, I get a download manager process, but shortly after stops, and the enabled button switches back to grey ‘disabled’. I further found that libhoudini tends to be used for this native bridge, and I searched and couldn’t find one for android 9, and maybe this is why I am unable to enable it. Running /system/bin/enable_nativebridge as a super user in the terminal emulator was also ineffective and resulted in the error ‘no such file or directory’.

Does anybody have any advice on what I should do? Is this really the source of my problem – not having a native bridge? Is it impossible to run Android with an intel processor? Is there an alternative to libhoudini? Are there any versions of android I can use and guaranteed to work – I basically need a few apps and that’s it – microsoft office, adobe, kindle, udemy, coursera and youtube.

Thanks.

network – Do you need to update a router that is set in bridge mode?

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centos – KVM Bridge strangness – no IPADDR in interface but shown in ‘if ADDR’ & loose ssh access when run virt-install

This is odd, the main interface (enp7s0) has an IP address. There is no IP address in the ifcfg-enp7s0, its in ifcfg-br0. Things seems to be working but when I set this up on my test server I did not get a IP on the main interface. Any ideas?

UPDATE: actually almost all is working. When I do virt-install I lose ssh access to the server. The existing terminals conected via ssh still work, its the new ones that will not connect, 22 time out error. If I kill the virt-install I can ssh in on new term.

ifcfg-enp7s0

DEVICE="enp7s0"
NM_CONTROLLED="no"
ONBOOT=yes
#HWADDR=2c:4d:54:43:92:df
TYPE=Ethernet
BOOTPROTO=none
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System enp7s0"
BRIDGE=br0

ifcfg-br0

DEVICE="br0"
NM_CONTROLLED="no"
ONBOOT=yes
#HWADDR=2c:4d:54:43:92:df
TYPE=Bridge
BOOTPROTO=static
IPADDR=xxx.171.204.107
NETMASK=255.255.252.0
IPV4_FAILURE_FATAL=yes
IPV6INIT=no

route-br0

xxx.171.204.1 dev br0
default via xxx.171.204.1

ip addr

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: enp7s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master br0 state UP group default qlen 1000
    link/ether 2c:4d:54:43:92:df brd ff:ff:ff:ff:ff:ff
    inet xxx.171.204.107/22 brd 213.171.207.255 scope global enp7s0
       valid_lft forever preferred_lft forever
    inet6 fe80::2e4d:54ff:fe43:92df/64 scope link
       valid_lft forever preferred_lft forever
3: enp8s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 2c:4d:54:43:92:e0 brd ff:ff:ff:ff:ff:ff
5: br-369501bb177f: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
    link/ether 02:42:22:7c:d4:52 brd ff:ff:ff:ff:ff:ff
    inet 172.18.0.1/16 brd 172.18.255.255 scope global br-369501bb177f
       valid_lft forever preferred_lft forever
    inet6 fe80::42:22ff:fe7c:d452/64 scope link
       valid_lft forever preferred_lft forever
32: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:56:31:0e brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
33: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:56:31:0e brd ff:ff:ff:ff:ff:ff
36: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 2c:4d:54:43:92:df brd ff:ff:ff:ff:ff:ff
    inet xxx.171.204.107/22 brd 213.171.207.255 scope global br0
       valid_lft forever preferred_lft forever
    inet6 fe80::2e4d:54ff:fe43:92df/64 scope link
       valid_lft forever preferred_lft forever

networks: cannot connect to the internet through the bridge adapter in the virtual box

I am trying to access my ubuntu server which is installed in the virtual box using ssh, but ubuntu does not detect the wireless interface.
Here is my configuration on the server:

output of the ifconfig command

ubuntu setup in virtual box

on the client side:

$ ssh mohammad@192.168.43.161

ssh: connect to host 192.168.43.161 port 22: connection timeout


openssh-server and openssh-client are installed and running on both machines.

Where is this bridge, what is this city?

I'm trying to locate that old bridge. Do you recognize the bridge or the city?

enter the image description here

It is a snapshot of a television documentary, the comment mentioned Nice or Nice, but these cities do not seem to have such large rivers. I searched the internet and they really don't look like this.

I tried a reverse image search, but all I got are landscapes from southern Europe. And the image doesn't have any useful EXIF ​​metadata, since I took the screenshot myself.

I am sure some of you will recognize this place immediately.

wireless bridge: can I use a DIR610 router as a wired repeater?

I have a replacement router from the previous model, and there is a corner of my house that gets poor coverage from my dual band router, so I thought about using the first one as WiFi repeater for N band.

So I went into their settings, I set it up as a repeater, but I was surprised to see that it would simply ignore that there is a gigabit connection coming in via cable and it will connect via WiFi, then it repeats the signal, and it seems like you have no option to use the cablr instead. When connected, I get, in the best situation, a ridiculous 20 megabit bandwidth, about half the speed I get from the other router's death signal.

Worst of all, while looking at it as a repeater, it asks for my SSID and password. I thought it would change to the same SSID and password, but no, just repeat the damn signal (as I said, it degrades the connection, even with a low signal I get at least 30-50 mbits from the other router, problem is when I get out of that side of the house, I start to have DC) and I can no longer access your console, so if I want to change any of its settings, I have to test it and then configure all the settings BEFORE I bypass it.

Is everything supposed to be like this? I mean, I know it's a cheap, old router, but I didn't know routers were that dumb.

Thank you.

Germany: Where in the wider area of ​​Frankfurt am Main is this closed railway bridge located?

In the movie Live (2020) (alternative link including stream), after about 1 hour and 9 minutes, there is a scene on a railway bridge that is part of an abandoned railway. Most of the rest of the film is shot in the vicinity of Frankfurt am Main, Germany, so this shot probably is, too. Other shots just before this scene contain a tunnel with tracks still present. Where is?

Unfortunately, the shot is at night, but being a nuit américaine, some shapes can still be recognized, probably enough to identify it for someone who knows the place.

This is a frame from the movie at 01:08:49 (click for larger version):

Still from the movie Live (2020) at 01:08:49, showing a railway bridge at night

The other close shot, apparently in a tunnel, perhaps from the same railroad (at 01:06:44):

Still from the same movie at 01:06:44, showing a railway tunnel at night

bridge – Ubuntu server 16.04 and OVS 2.5.5 Stretch VLAN on 2 sites

I am proof of concept for a client, the requirements are as follows:

Stretch the ERP (Extended VLAN) network in 2 places, this is necessary due to outdated machinery that has to communicate with a particular IP address; We cannot change the direction of the ERP HA since the industrial machinery has a hard code.

What I have is the following configuration:

2 Ubuntu server 16.04 3 NIC for each OVS server version 2.5.5

Server configurations:

They are respectively named OVS1 and OVS2. The server network has 1 NIC for administration (those configuration identities are reflected in the two servers, the IP addressing is different) 1 NIC is assigned to an OVS-bridge AB100, a physical port is assigned to this the bridge NIC 1 is assigned to an OUTBOUND of the OVS bridge, a physical port is assigned to this bridge

Bridges are addresses and settings as follows on each server:

On OVS1 Bridge AB100 it has an IP address of 10.1.1.201 On OVS1 Bridge AB100 it has a VXLAN100 with remote IP 172.29.0.2 On OVS1 Bridge AB100 it has GRE0 with remote IP 172.29.0.4 On OVS1 Bridge OUTBOUND it has an IP address of 172.24.0.1

On OVS2 Bridge AB100 it has an IP address of 10.1.1.202 On OVS1 Bridge AB100 it has a VXLAN100 with remote IP 172.29.0.1 On OVS1 Bridge AB100 it has GRE0 with remote IP 172.29.0.3 On OVS1 Bridge OUTBOUND it has an IP address of 172.24.0.2

OVS1 interface eth0 is for management OVS2 interface eth0 is for management OVS1 interface eth1 is bridged AB100 OVS2 interface eth1 is bridged AB100 OVS1 interface eth2 is bridged OUT OVS2 interface eth2 is bridged OUT

Physical connectivity:

OVS1 interface eth0, management on physical management switch1 OVS2 interface eth0, management on physical management switch1 OVS1 interface eth1, jumper AB100 on physical management switch2 OVS2 interface eth1, jumper AB100 on physical management switch2 OVS1 interface eth2, OUTBOUND jumper on physical management switch3 OVS2 eth2 interface, OUTBOUND jumper on physical management switch3

The eth0 interface is not part of any OVS switch, it is currently working and it is the medium where I can use SSH and manage the devices.

What is connected to them:

OVS1 eth1 interface, AB100 jumper on physical management switch2, Mint desktop with IP 10.1.1.2 OVS2 eth1 interface, AB100 jumper on physical management switch2, Fedora desktop with IP 10.1.1.3 Secondary IP address 10.1.1.254, which will vary depending What the asset is, but for this example, leave it on 10.1.1.2 One of the devices will have a secondary IP address of 10.1.1.254, which is the IP address to which all the factory devices connect.

Issue:

The connectivity of the two desktops to the local AB100 bridge is successful and they can ping each other. Ping one of IP 172.29.0.1 or 172.29.0.2 respectively reverse unsuccessful Ping one if IP 172.24.0.1 or 172.24.0.2 respectively from its own OVS is unsuccessful

Looking at the ARP-a you can see the IP address but not the MAC address of the respective OVS from the OUTGOING Bridge Looking at the ovs-appctl fdb / show OUTBOUND you can see the MAC address

The result should be that the two desktops should be able to ping each other through the VXLAN or GRE tunnel, but I am at the stage where there is no basic connectivity.

Any help and suggestion would be appreciated.

Cheers

MEMA

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